diff --git a/app/src/main/java/me/zhanghai/android/files/provider/content/ContentFileSystem.kt b/app/src/main/java/me/zhanghai/android/files/provider/content/ContentFileSystem.kt
index c09219ba9..e6834598f 100644
--- a/app/src/main/java/me/zhanghai/android/files/provider/content/ContentFileSystem.kt
+++ b/app/src/main/java/me/zhanghai/android/files/provider/content/ContentFileSystem.kt
@@ -31,9 +31,7 @@ internal class ContentFileSystem(private val provider: ContentFileSystemProvider
 
     override fun isReadOnly(): Boolean = false
 
-    override fun getSeparator(): String {
-        throw UnsupportedOperationException()
-    }
+    override fun getSeparator(): String = SEPARATOR_STRING
 
     override fun getRootDirectories(): Iterable<Path> = emptyList()
 
@@ -80,6 +78,9 @@ internal class ContentFileSystem(private val provider: ContentFileSystemProvider
     override fun writeToParcel(dest: Parcel, flags: Int) {}
 
     companion object {
+        const val SEPARATOR = '/'.code.toByte()
+        private const val SEPARATOR_STRING = SEPARATOR.toInt().toChar().toString()
+
         @JvmField
         val CREATOR = object : Parcelable.Creator<ContentFileSystem> {
             override fun createFromParcel(source: Parcel): ContentFileSystem =
diff --git a/app/src/main/java/me/zhanghai/android/files/provider/content/ContentPath.kt b/app/src/main/java/me/zhanghai/android/files/provider/content/ContentPath.kt
index d1e8d323c..363263f30 100644
--- a/app/src/main/java/me/zhanghai/android/files/provider/content/ContentPath.kt
+++ b/app/src/main/java/me/zhanghai/android/files/provider/content/ContentPath.kt
@@ -32,14 +32,15 @@ internal class ContentPath : ByteStringListPath<ContentPath> {
     val uri: Uri?
 
     constructor(fileSystem: ContentFileSystem, uri: Uri) : super(
-        0.toByte(), true, listOf(uri.displayNameOrUri)
+        ContentFileSystem.SEPARATOR, true,
+        listOf(Uri.encode(uri.toString()).toByteString(), uri.bestFileName)
     ) {
         this.fileSystem = fileSystem
         this.uri = uri
     }
 
     private constructor(fileSystem: ContentFileSystem, segments: List<ByteString>) : super(
-        0.toByte(), false, segments
+        ContentFileSystem.SEPARATOR, false, segments
     ) {
         this.fileSystem = fileSystem
         uri = null
@@ -149,14 +150,14 @@ internal class ContentPath : ByteStringListPath<ContentPath> {
     }
 
     companion object {
-        private val Uri.displayNameOrUri: ByteString
+        private val Uri.bestFileName: ByteString
             get() =
                 (try {
                     Resolver.getDisplayName(this)
                 } catch (e: ResolverException) {
                     e.printStackTrace()
                     null
-                } ?: lastPathSegment ?: toString()).toByteString()
+                } ?: lastPathSegment ?: "file").toByteString()
 
         @JvmField
         val CREATOR = object : Parcelable.Creator<ContentPath> {