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Full Disk Backup - Deleting Earlier version corrupts later version

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Using Acronis 2020, I created a full disk backup. I set the backup method to Full so that the versions would not depend on each other. I created several backups. Acronis gave them filenames: COMPUTERNAME-FULL DISK.tibx COMPUTERNAME-FULL DISK-0001.tibx COMPUTERNAME-FULL DISK-0002.tibx I decided that I no longer needed the first two backups so I used windows to delete COMPUTERNAME-FULL DISK.tibx COMPUTERNAME-FULL DISK-0001.tibx I am now trying to restore some files from COMPUTERNAME-FULL DISK-0002.tibx but Acronis says An error occurred while opening the backup archive . . . . I verified this behavior with some known good backups. If I move the original backup from the folder and try to open a later backup then I get the same error. The error is resolved when I move the original backup back into the folder containing the later backup. This seems wrong. If I do a full backup then it should be able to stand on its own. I contacted Acronis support and they said I am out of luck.

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JWilson, welcome to these public User Forums.

You should not be deleting any Acronis backup files from Windows unless you have also deleted the backup task that created them from the ATI GUI.  This is especially true for the new .tibx files as the first file created is always required as contains metadata information for all subsequent files, so your deleting COMPUTERNAME-FULL DISK.tibx is at the core of this issue!

Please use the new 'Clean up versions' option for your backup task when you want to remove unwanted backup files (not Explorer) - this knows what files are needed and what can be removed.

In ATI 2020, due to the new .tibx format, it is especially important to not move, delete, or rename files outside of the Acronis GUI.  The metadata will always be tied to the very first file (which gets shrunk to 12KB and left behind, but required, after any automated cleanups too).  Please see:

63227: Acronis True Image: Do not delete .TIB or .TIBX files outside of Acronis True Image