diff --git a/app/src/main/java/io/legado/app/help/BookHelp.kt b/app/src/main/java/io/legado/app/help/BookHelp.kt
index 41dc7376e..1cf95b2f2 100644
--- a/app/src/main/java/io/legado/app/help/BookHelp.kt
+++ b/app/src/main/java/io/legado/app/help/BookHelp.kt
@@ -23,7 +23,7 @@ import kotlin.math.min
 object BookHelp {
     private const val cacheFolderName = "book_cache"
     private const val cacheImageFolderName = "images"
-    private val downloadDir: File = appCtx.externalFilesDir
+    private val downloadDir: File = appCtx.externalFiles
     private val downloadImages = CopyOnWriteArraySet<String>()
 
     fun clearCache() {
diff --git a/app/src/main/java/io/legado/app/help/JsExtensions.kt b/app/src/main/java/io/legado/app/help/JsExtensions.kt
index 084058044..deccf818f 100644
--- a/app/src/main/java/io/legado/app/help/JsExtensions.kt
+++ b/app/src/main/java/io/legado/app/help/JsExtensions.kt
@@ -85,6 +85,7 @@ interface JsExtensions {
 
     /**
      * 实现16进制字符串转文件
+     * @return 相对路径
      */
     fun downloadFile(content: String, url: String): String {
         val type = AnalyzeUrl(url).type ?: return ""
@@ -99,45 +100,7 @@ interface JsExtensions {
                 zipFile.writeBytes(it)
             }
         }
-        return zipPath
-    }
-
-    /**
-     * js实现压缩文件解压
-     */
-    fun unzipFile(zipPath: String): String {
-        if (zipPath.isEmpty()) return ""
-        val unzipPath = FileUtils.getPath(
-            FileUtils.createFolderIfNotExist(FileUtils.getCachePath()),
-            FileUtils.getNameExcludeExtension(zipPath)
-        )
-        FileUtils.deleteFile(unzipPath)
-        val zipFile = FileUtils.createFileIfNotExist(zipPath)
-        val unzipFolder = FileUtils.createFolderIfNotExist(unzipPath)
-        ZipUtils.unzipFile(zipFile, unzipFolder)
-        FileUtils.deleteFile(zipPath)
-        return unzipPath
-    }
-
-    /**
-     * js实现文件夹内所有文件读取
-     */
-    fun getTxtInFolder(unzipPath: String): String {
-        if (unzipPath.isEmpty()) return ""
-        val unzipFolder = FileUtils.createFolderIfNotExist(unzipPath)
-        val contents = StringBuilder()
-        unzipFolder.listFiles().let {
-            if (it != null) {
-                for (f in it) {
-                    val charsetName = EncodingDetect.getEncode(f)
-                    contents.append(String(f.readBytes(), charset(charsetName)))
-                        .append("\n")
-                }
-                contents.deleteCharAt(contents.length - 1)
-            }
-        }
-        FileUtils.deleteFile(unzipPath)
-        return contents.toString()
+        return zipPath.substring(FileUtils.getCachePath().length)
     }
 
     /**
@@ -257,13 +220,15 @@ interface JsExtensions {
         return HtmlFormatter.formatKeepImg(str)
     }
 
+    //****************文件操作******************//
+
     /**
      * 获取本地文件
      * @param path 相对路径
      * @return File
      */
     fun getFile(path: String): File {
-        val cachePath = appCtx.eCacheDir.path
+        val cachePath = appCtx.externalCache.absolutePath
         val aPath = if (path.startsWith(File.separator)) {
             cachePath + path
         } else {
@@ -306,13 +271,43 @@ interface JsExtensions {
     }
 
     /**
-     * 解析字体,返回字体解析类
+     * js实现压缩文件解压
+     * @param zipPath 相对路径
+     * @return 相对路径
      */
-    fun queryBase64TTF(base64: String?): QueryTTF? {
-        base64DecodeToByteArray(base64)?.let {
-            return QueryTTF(it)
+    fun unzipFile(zipPath: String): String {
+        if (zipPath.isEmpty()) return ""
+        val unzipPath = FileUtils.getPath(
+            FileUtils.createFolderIfNotExist(FileUtils.getCachePath()),
+            FileUtils.getNameExcludeExtension(zipPath)
+        )
+        FileUtils.deleteFile(unzipPath)
+        val zipFile = getFile(zipPath)
+        val unzipFolder = FileUtils.createFolderIfNotExist(unzipPath)
+        ZipUtils.unzipFile(zipFile, unzipFolder)
+        FileUtils.deleteFile(zipPath)
+        return unzipPath.substring(FileUtils.getCachePath().length)
+    }
+
+    /**
+     * js实现文件夹内所有文件读取
+     */
+    fun getTxtInFolder(unzipPath: String): String {
+        if (unzipPath.isEmpty()) return ""
+        val unzipFolder = getFile(unzipPath)
+        val contents = StringBuilder()
+        unzipFolder.listFiles().let {
+            if (it != null) {
+                for (f in it) {
+                    val charsetName = EncodingDetect.getEncode(f)
+                    contents.append(String(f.readBytes(), charset(charsetName)))
+                        .append("\n")
+                }
+                contents.deleteCharAt(contents.length - 1)
+            }
         }
-        return null
+        FileUtils.deleteFile(unzipPath)
+        return contents.toString()
     }
 
     /**
@@ -368,6 +363,18 @@ interface JsExtensions {
         return null
     }
 
+    //******************文件操作************************//
+
+    /**
+     * 解析字体,返回字体解析类
+     */
+    fun queryBase64TTF(base64: String?): QueryTTF? {
+        base64DecodeToByteArray(base64)?.let {
+            return QueryTTF(it)
+        }
+        return null
+    }
+
     /**
      * 返回字体解析类
      * @param str 支持url,本地文件,base64,自动判断,自动缓存
diff --git a/app/src/main/java/io/legado/app/help/storage/BookWebDav.kt b/app/src/main/java/io/legado/app/help/storage/BookWebDav.kt
index 5af0231f0..6147ff1db 100644
--- a/app/src/main/java/io/legado/app/help/storage/BookWebDav.kt
+++ b/app/src/main/java/io/legado/app/help/storage/BookWebDav.kt
@@ -23,7 +23,7 @@ import java.util.*
 object BookWebDav {
     private const val defaultWebDavUrl = "https://dav.jianguoyun.com/dav/"
     private val bookProgressUrl = "${rootWebDavUrl}bookProgress/"
-    private val zipFilePath = "${FileUtils.getCachePath()}${File.separator}backup.zip"
+    private val zipFilePath = "${appCtx.externalFiles.absolutePath}${File.separator}backup.zip"
 
     private val rootWebDavUrl: String
         get() {
diff --git a/app/src/main/java/io/legado/app/model/localBook/EpubFile.kt b/app/src/main/java/io/legado/app/model/localBook/EpubFile.kt
index 5365be900..93f96132f 100644
--- a/app/src/main/java/io/legado/app/model/localBook/EpubFile.kt
+++ b/app/src/main/java/io/legado/app/model/localBook/EpubFile.kt
@@ -9,7 +9,7 @@ import io.legado.app.help.BookHelp
 import io.legado.app.utils.FileUtils
 import io.legado.app.utils.HtmlFormatter
 import io.legado.app.utils.MD5Utils
-import io.legado.app.utils.externalFilesDir
+import io.legado.app.utils.externalFiles
 import me.ag2s.epublib.domain.EpubBook
 import me.ag2s.epublib.epub.EpubReader
 import org.jsoup.Jsoup
@@ -80,7 +80,7 @@ class EpubFile(var book: Book) {
             epubBook?.let {
                 if (book.coverUrl.isNullOrEmpty()) {
                     book.coverUrl = FileUtils.getPath(
-                        appCtx.externalFilesDir,
+                        appCtx.externalFiles,
                         "covers",
                         "${MD5Utils.md5Encode16(book.bookUrl)}.jpg"
                     )
diff --git a/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt b/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt
index 30c9f65db..46d7ba187 100644
--- a/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt
+++ b/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt
@@ -119,7 +119,7 @@ object LocalBook {
             author = author,
             originName = fileName,
             coverUrl = FileUtils.getPath(
-                appCtx.externalFilesDir,
+                appCtx.externalFiles,
                 "covers",
                 "${MD5Utils.md5Encode16(path)}.jpg"
             )
diff --git a/app/src/main/java/io/legado/app/model/localBook/UmdFile.kt b/app/src/main/java/io/legado/app/model/localBook/UmdFile.kt
index de6c1586f..0451b44ca 100644
--- a/app/src/main/java/io/legado/app/model/localBook/UmdFile.kt
+++ b/app/src/main/java/io/legado/app/model/localBook/UmdFile.kt
@@ -4,17 +4,16 @@ import android.net.Uri
 import android.util.Log
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
-
 import io.legado.app.utils.FileUtils
 import io.legado.app.utils.MD5Utils
-import io.legado.app.utils.externalFilesDir
+import io.legado.app.utils.externalFiles
 import io.legado.app.utils.isContentScheme
 import me.ag2s.umdlib.domain.UmdBook
 import me.ag2s.umdlib.umd.UmdReader
 import splitties.init.appCtx
 import java.io.File
 import java.io.InputStream
-import java.util.ArrayList
+import java.util.*
 
 class UmdFile(var book: Book) {
     companion object {
@@ -74,7 +73,7 @@ class UmdFile(var book: Book) {
             umdBook?.let {
                 if (book.coverUrl.isNullOrEmpty()) {
                     book.coverUrl = FileUtils.getPath(
-                        appCtx.externalFilesDir,
+                        appCtx.externalFiles,
                         "covers",
                         "${MD5Utils.md5Encode16(book.bookUrl)}.jpg"
                     )
diff --git a/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditActivity.kt b/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditActivity.kt
index c8e645b11..805edfe5f 100644
--- a/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditActivity.kt
@@ -108,7 +108,7 @@ class BookInfoEditActivity :
         if (uri.isContentScheme()) {
             val doc = DocumentFile.fromSingleUri(this, uri)
             doc?.name?.let {
-                var file = this.externalFilesDir
+                var file = this.externalFiles
                 file = FileUtils.createFileIfNotExist(file, "covers", it)
                 kotlin.runCatching {
                     DocumentUtils.readBytes(this, doc.uri)
@@ -128,7 +128,7 @@ class BookInfoEditActivity :
                     RealPathUtil.getPath(this, uri)?.let { path ->
                         val imgFile = File(path)
                         if (imgFile.exists()) {
-                            var file = this.externalFilesDir
+                            var file = this.externalFiles
                             file = FileUtils.createFileIfNotExist(file, "covers", imgFile.name)
                             file.writeBytes(imgFile.readBytes())
                             coverChangeTo(file.absolutePath)
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
index 224d4b93d..3837b6c22 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
@@ -224,7 +224,7 @@ class BgTextConfigDialog : BaseDialogFragment() {
         }
         execute {
             val exportFiles = arrayListOf<File>()
-            val configDirPath = FileUtils.getPath(requireContext().eCacheDir, "readConfig")
+            val configDirPath = FileUtils.getPath(requireContext().externalCache, "readConfig")
             FileUtils.deleteFile(configDirPath)
             val configDir = FileUtils.createFolderIfNotExist(configDirPath)
             val configExportPath = FileUtils.getPath(configDir, "readConfig.json")
@@ -269,7 +269,7 @@ class BgTextConfigDialog : BaseDialogFragment() {
                     exportFiles.add(bgExportFile)
                 }
             }
-            val configZipPath = FileUtils.getPath(requireContext().eCacheDir, configFileName)
+            val configZipPath = FileUtils.getPath(requireContext().externalCache, configFileName)
             if (ZipUtils.zipFiles(exportFiles, File(configZipPath))) {
                 if (uri.isContentScheme()) {
                     DocumentFile.fromTreeUri(requireContext(), uri)?.let { treeDoc ->
@@ -331,11 +331,11 @@ class BgTextConfigDialog : BaseDialogFragment() {
     @Suppress("BlockingMethodInNonBlockingContext")
     private fun importConfig(byteArray: ByteArray) {
         execute {
-            val configZipPath = FileUtils.getPath(requireContext().eCacheDir, configFileName)
+            val configZipPath = FileUtils.getPath(requireContext().externalCache, configFileName)
             FileUtils.deleteFile(configZipPath)
             val zipFile = FileUtils.createFileIfNotExist(configZipPath)
             zipFile.writeBytes(byteArray)
-            val configDirPath = FileUtils.getPath(requireContext().eCacheDir, "readConfig")
+            val configDirPath = FileUtils.getPath(requireContext().externalCache, "readConfig")
             FileUtils.deleteFile(configDirPath)
             ZipUtils.unzipFile(zipFile, FileUtils.createFolderIfNotExist(configDirPath))
             val configDir = FileUtils.createFolderIfNotExist(configDirPath)
@@ -344,7 +344,7 @@ class BgTextConfigDialog : BaseDialogFragment() {
             if (config.textFont.isNotEmpty()) {
                 val fontName = FileUtils.getName(config.textFont)
                 val fontPath =
-                    FileUtils.getPath(requireContext().externalFilesDir, "font", fontName)
+                    FileUtils.getPath(requireContext().externalFiles, "font", fontName)
                 if (!FileUtils.exist(fontPath)) {
                     FileUtils.getFile(configDir, fontName).copyTo(File(fontPath))
                 }
@@ -352,7 +352,7 @@ class BgTextConfigDialog : BaseDialogFragment() {
             }
             if (config.bgType == 2) {
                 val bgName = FileUtils.getName(config.bgStr)
-                val bgPath = FileUtils.getPath(requireContext().externalFilesDir, "bg", bgName)
+                val bgPath = FileUtils.getPath(requireContext().externalFiles, "bg", bgName)
                 if (!FileUtils.exist(bgPath)) {
                     val bgFile = FileUtils.getFile(configDir, bgName)
                     if (bgFile.exists()) {
@@ -362,7 +362,7 @@ class BgTextConfigDialog : BaseDialogFragment() {
             }
             if (config.bgTypeNight == 2) {
                 val bgName = FileUtils.getName(config.bgStrNight)
-                val bgPath = FileUtils.getPath(requireContext().externalFilesDir, "bg", bgName)
+                val bgPath = FileUtils.getPath(requireContext().externalFiles, "bg", bgName)
                 if (!FileUtils.exist(bgPath)) {
                     val bgFile = FileUtils.getFile(configDir, bgName)
                     if (bgFile.exists()) {
@@ -372,7 +372,7 @@ class BgTextConfigDialog : BaseDialogFragment() {
             }
             if (config.bgTypeEInk == 2) {
                 val bgName = FileUtils.getName(config.bgStrEInk)
-                val bgPath = FileUtils.getPath(requireContext().externalFilesDir, "bg", bgName)
+                val bgPath = FileUtils.getPath(requireContext().externalFiles, "bg", bgName)
                 if (!FileUtils.exist(bgPath)) {
                     val bgFile = FileUtils.getFile(configDir, bgName)
                     if (bgFile.exists()) {
@@ -395,7 +395,7 @@ class BgTextConfigDialog : BaseDialogFragment() {
             val doc = DocumentFile.fromSingleUri(requireContext(), uri)
             doc?.name?.let {
                 val file =
-                    FileUtils.createFileIfNotExist(requireContext().externalFilesDir, "bg", it)
+                    FileUtils.createFileIfNotExist(requireContext().externalFiles, "bg", it)
                 kotlin.runCatching {
                     DocumentUtils.readBytes(requireContext(), doc.uri)
                 }.getOrNull()?.let { byteArray ->
diff --git a/app/src/main/java/io/legado/app/ui/config/OtherConfigFragment.kt b/app/src/main/java/io/legado/app/ui/config/OtherConfigFragment.kt
index 9a9d7b9bd..5547b76db 100644
--- a/app/src/main/java/io/legado/app/ui/config/OtherConfigFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/config/OtherConfigFragment.kt
@@ -226,7 +226,7 @@ class OtherConfigFragment : BasePreferenceFragment(),
         if (uri.isContentScheme()) {
             val doc = DocumentFile.fromSingleUri(requireContext(), uri)
             doc?.name?.let {
-                var file = requireContext().externalFilesDir
+                var file = requireContext().externalFiles
                 file = FileUtils.createFileIfNotExist(file, "covers", it)
                 kotlin.runCatching {
                     DocumentUtils.readBytes(requireContext(), doc.uri)
@@ -247,7 +247,7 @@ class OtherConfigFragment : BasePreferenceFragment(),
                     RealPathUtil.getPath(requireContext(), uri)?.let { path ->
                         val imgFile = File(path)
                         if (imgFile.exists()) {
-                            var file = requireContext().externalFilesDir
+                            var file = requireContext().externalFiles
                             file = FileUtils.createFileIfNotExist(file, "covers", imgFile.name)
                             file.writeBytes(imgFile.readBytes())
                             putPrefString(PreferKey.defaultCover, file.absolutePath)
diff --git a/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt b/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt
index 2a5e414ee..94eb8987b 100644
--- a/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt
@@ -225,7 +225,7 @@ class ThemeConfigFragment : BasePreferenceFragment(),
         if (uri.isContentScheme()) {
             val doc = DocumentFile.fromSingleUri(requireContext(), uri)
             doc?.name?.let {
-                var file = requireContext().externalFilesDir
+                var file = requireContext().externalFiles
                 file = FileUtils.createFileIfNotExist(file, preferenceKey, it)
                 kotlin.runCatching {
                     DocumentUtils.readBytes(requireContext(), doc.uri)
@@ -247,7 +247,7 @@ class ThemeConfigFragment : BasePreferenceFragment(),
                     RealPathUtil.getPath(requireContext(), uri)?.let { path ->
                         val imgFile = File(path)
                         if (imgFile.exists()) {
-                            var file = requireContext().externalFilesDir
+                            var file = requireContext().externalFiles
                             file = FileUtils.createFileIfNotExist(file, preferenceKey, imgFile.name)
                             file.writeBytes(imgFile.readBytes())
                             putPrefString(preferenceKey, file.absolutePath)
diff --git a/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt b/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt
index c070e4361..22f205101 100644
--- a/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt
@@ -139,7 +139,7 @@ class FontSelectDialog : BaseDialogFragment(),
     private fun getLocalFonts(): ArrayList<DocItem> {
         val fontItems = arrayListOf<DocItem>()
         val fontDir =
-            FileUtils.createFolderIfNotExist(requireContext().externalFilesDir, "font")
+            FileUtils.createFolderIfNotExist(requireContext().externalFiles, "font")
         fontDir.listFiles { pathName ->
             pathName.name.lowercase(Locale.getDefault()).matches(fontRegex)
         }?.forEach {
diff --git a/app/src/main/java/io/legado/app/utils/ContextExtensions.kt b/app/src/main/java/io/legado/app/utils/ContextExtensions.kt
index f11a7f890..315c76c67 100644
--- a/app/src/main/java/io/legado/app/utils/ContextExtensions.kt
+++ b/app/src/main/java/io/legado/app/utils/ContextExtensions.kt
@@ -224,10 +224,10 @@ val Context.sysBattery: Int
         return batteryStatus?.getIntExtra(BatteryManager.EXTRA_LEVEL, -1) ?: -1
     }
 
-val Context.externalFilesDir: File
+val Context.externalFiles: File
     get() = this.getExternalFilesDir(null) ?: this.filesDir
 
-val Context.eCacheDir: File
+val Context.externalCache: File
     get() = this.externalCacheDir ?: this.cacheDir
 
 fun Context.openUrl(url: String) {
diff --git a/app/src/main/java/io/legado/app/utils/FileUtils.kt b/app/src/main/java/io/legado/app/utils/FileUtils.kt
index 1e8c8b502..c0f8e0dda 100644
--- a/app/src/main/java/io/legado/app/utils/FileUtils.kt
+++ b/app/src/main/java/io/legado/app/utils/FileUtils.kt
@@ -105,8 +105,7 @@ object FileUtils {
     }
 
     fun getCachePath(): String {
-        return appCtx.externalCacheDir?.absolutePath
-            ?: appCtx.cacheDir.absolutePath
+        return appCtx.externalCache.absolutePath
     }
 
     fun getSdCardPath(): String {