Created attachment 841094 [details] Screenshot of btrfs check > Would you please take a btrfs-image dump by: > > # btrfs-image -c9 <device> dump.img Done. > > This need the fs to be unmounted. > And upload to the R&D network server. I don't know where this server is or how to access it. Can you tell me more about it so I can do this upload? > > And since the fs needs to be unmounted anyway, a btrfs check may also help. Screenshot attached. No errors were found.