Empty backup image

i’m using Winclone Version 7.3.4 (421138) on MacBook Pro Mid 2015 macOS Mojave 10.14.6.
Trying to backup a windows 10 Bootcamp volume
image is created but is almost empty and contains only following files

Until 6/26 image creation was working fine, image size was about 30 GB. I’m not using incremental backup.

Best regards, Luca

boot.img.gz is suppose to be a lot larger. Can you check the log? Running chkdsk can resolve this error.