diff --git a/vector/src/main/java/im/vector/app/core/dialogs/GalleryOrCameraDialogHelper.kt b/vector/src/main/java/im/vector/app/core/dialogs/GalleryOrCameraDialogHelper.kt
index 7198cdb4a2..5ecabd2aaa 100644
--- a/vector/src/main/java/im/vector/app/core/dialogs/GalleryOrCameraDialogHelper.kt
+++ b/vector/src/main/java/im/vector/app/core/dialogs/GalleryOrCameraDialogHelper.kt
@@ -23,6 +23,7 @@ import androidx.core.net.toUri
 import androidx.fragment.app.Fragment
 import com.yalantis.ucrop.UCrop
 import im.vector.app.R
+import im.vector.app.core.extensions.insertBeforeLast
 import im.vector.app.core.extensions.registerStartForActivityResult
 import im.vector.app.core.resources.ColorProvider
 import im.vector.app.core.utils.PERMISSIONS_FOR_TAKING_PHOTO
@@ -86,7 +87,7 @@ class GalleryOrCameraDialogHelper(
     }
 
     private fun startUCrop(image: MultiPickerImageType) {
-        val destinationFile = File(activity.cacheDir, "${image.displayName}_e_${System.currentTimeMillis()}")
+        val destinationFile = File(activity.cacheDir, image.displayName.insertBeforeLast("_e_${System.currentTimeMillis()}"))
         val uri = image.contentUri
         createUCropWithDefaultSettings(colorProvider, uri, destinationFile.toUri(), fragment.getString(R.string.rotate_and_crop_screen_title))
                 .withAspectRatio(1f, 1f)
diff --git a/vector/src/main/java/im/vector/app/core/extensions/BasicExtensions.kt b/vector/src/main/java/im/vector/app/core/extensions/BasicExtensions.kt
index c3e6520a46..07a684abef 100644
--- a/vector/src/main/java/im/vector/app/core/extensions/BasicExtensions.kt
+++ b/vector/src/main/java/im/vector/app/core/extensions/BasicExtensions.kt
@@ -48,3 +48,21 @@ fun CharSequence.isMsisdn(): Boolean {
         false
     }
 }
+
+/**
+ * Useful to append a String at the end of a filename but before the extension if any
+ * Ex:
+ * - "file.txt".insertBeforeLast("_foo") will return "file_foo.txt"
+ * - "file".insertBeforeLast("_foo") will return "file_foo"
+ * - "fi.le.txt".insertBeforeLast("_foo") will return "fi.le_foo.txt"
+ * - null.insertBeforeLast("_foo") will return "_foo"
+ */
+fun String?.insertBeforeLast(insert: String, delimiter: String = ".") : String {
+    if (this == null) return insert
+    val idx = lastIndexOf(delimiter)
+    return if (idx == -1) {
+        this + insert
+    } else {
+        replaceRange(idx, idx, insert)
+    }
+}
diff --git a/vector/src/main/java/im/vector/app/features/attachments/preview/AttachmentsPreviewFragment.kt b/vector/src/main/java/im/vector/app/features/attachments/preview/AttachmentsPreviewFragment.kt
index 9f3ba39bbe..ba0250724c 100644
--- a/vector/src/main/java/im/vector/app/features/attachments/preview/AttachmentsPreviewFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/attachments/preview/AttachmentsPreviewFragment.kt
@@ -38,6 +38,7 @@ import com.airbnb.mvrx.withState
 import com.yalantis.ucrop.UCrop
 import im.vector.app.R
 import im.vector.app.core.extensions.cleanup
+import im.vector.app.core.extensions.insertBeforeLast
 import im.vector.app.core.extensions.registerStartForActivityResult
 import im.vector.app.core.platform.VectorBaseFragment
 import im.vector.app.core.resources.ColorProvider
@@ -170,7 +171,7 @@ class AttachmentsPreviewFragment @Inject constructor(
 
     private fun handleEditAction() = withState(viewModel) {
         val currentAttachment = it.attachments.getOrNull(it.currentAttachmentIndex) ?: return@withState
-        val destinationFile = File(requireContext().cacheDir, "${currentAttachment.name}_edited_image_${System.currentTimeMillis()}")
+        val destinationFile = File(requireContext().cacheDir, currentAttachment.name.insertBeforeLast("_edited_image_${System.currentTimeMillis()}"))
         val uri = currentAttachment.queryUri
         createUCropWithDefaultSettings(colorProvider, uri, destinationFile.toUri(), currentAttachment.name)
                 .getIntent(requireContext())