Kbackup creates tar file which can not be opened

Help
1

Hello all,
I have just installed Kbackup in my search for a nice backup program. I created the first (full) backup, which took just over an hour, on my NAS.
The result is a 299GB tar file which my computer can’t open. I get:

Could not open the file, probably due to an unsupported file format.
tar:///mnt/NAS/KBackup/backup_2025.09.02-13.39.19_1.tar

Now I wonder how I can restore one small file in that huge tar file if I can’t even open it. How do others do that? Wouldn’t it be better, easier to construct the same directory structure as the original? Restoring is then simple a matter of copying a file from the backup folder to the original folder.

[EDIT} Oops I saw it, I can open the file with ARK and it can handle a file that big. Sorry.

2

Possibly incomplete or corrupted.

Try verifying:

Could not open the file, probably due to an unsupported file format.
tar -tf /mnt/NAS/KBackup/backup_2025.09.02-13.39.19_1.tar

If that fails, the tar is broken.