Backup cataloge to external drive: repeated Error can't write file (PSE2023)

Hello all,

I repeatedly tried to fully backup my catalog to an external drive (f:) under windows 11 - without success.

The error message means something like: "error writing to c:\users\...\...\catalogname\CAXMPFiles\2302382.xmp"

Info about Free disk sizes:

• The catalogs size on c: is about 12 GB, the foto folder and subfolders are about 500GB.
• The free space on my drve C: is about 15GB, the free space on my drive d: with the foto folders is about 60GB.
• The stick is empty besides the files (about 10GB) of the interrupted backup trials, free disk space is 950GB.

I did before backing up  the following:

• Repair the catalog
• Optimize the catalog
• and then I started the backup prceess
• the only warning ocured was that the program could not match some files with the catalog

Is there any suggestion what the cause of the error is?

Regards thank-you and happy new year

AAA

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