The issue may be caused by the following:

• A file with the same name already exists on a cloud service when you upload a file.

• A file with the same name already exists on the mobile device when you download a file.

"xxx" indicates the file name.

Perform the following:

• To keep the files on both sides, tap the [Keep Both] button.

• To replace the existing file with the new file, tap the [Replace] button.

  In this case, the existing file is replaced with the file that is downloaded or uploaded.