Activity (backup, validation, etc) fails with the following error:

Windows error: (0x80070570) The file or directory is corrupted and unreadable


After updating to macOS 10.15.4 backups fail with the following error:

The last backup has failed. Failed to enumerate directory 'Macintosh HD — Data:/private/var/db/lockdown/'. It may be corrupted or does not exist. Please check the disk for errors.


Catalina update 10.15.4 restricted access to folder /private/var/db/lockdown/ for security reasons.

When backing up to NAS or a network folder using Version 12 backup format, the archive may become corrupted and operations with the archive will fail with "data is corrupted: CRC mismatch or internal data structures mismatch".

Such errors are usually caused by hardware problems or file system issues on the backup destination.

Starting from Acronis Cyber Protect Cloud C20.12 (Build 26077) and Acronis Cyber Protect 15 Update 2 (Build 27009), you can create a system variable that enables the system to scan for the last good state of backup archive and attempt to repair it. After the repair, the backup archive should be accessible again.


You have a backup archive (TIBX) and operations with it (either continuing to back up to it, or restoring/extracting data from it) fail with errors that the archive is corrupted.

Goal: You want to run diagnosis (validate) the archive to see what is damaged in it and to what extent, and, if possible, you want to repair the archive (at least partially).

Applies to:

Both Windows and Mac versions of Acronis True Image (any year edition).


1. You try to run backup or recovery task in Acronis True Image, either automatically by schedule, or manually.

2. The task fails with the error message "Read error or data content is corrupted":