Hi guys.
On the topic, a little bit stretchy.
I'm on Solus Budgie.
I'm experiencing similar problem since Solus 4.4 and also the changed Nautilus with Nemo. The file manager may not be relevant, but these is my recall when I first noticed strange file system behavior.
First, when I copy files from EXT4 partition to NTFS, sometime the files disapear right after the end of the copy process. Gone - the folder is empty. Terminal doesn't show anything, no hidden files, the folder properties shows zero files and size. But If I create a simple file named with one of the missing files, the system says, that there is already file with the same name, in condition of an empty folder.
My guess was that the files are indexed wrong during the copy to NTFS file system and this cause the disappearance. Connecting the HDD to Windows, Repairing Tools, Fixing the errors and files pop-up.
This is good, but the issue with the vanishing files happened many times lately. It doesn't follow pattern. Whenever.
Second, after unmounting NTFS partition, then mounting again, sometimes Solus is unable to open it and says the same like with GeorgeLG: "wrong fs type, bad option, bad superblock on /dev/sda2, missing codepage or helper program, or other error".
And this happened two or three times. Again, looking for Windows, Repairing Tools, Fixing the errors and the drive is up. Untill a couple of days, when Windows said: "No errors to fix. Everything is fine.", but Solus said: "Nop, I still can't mount the partition, wrong fs type...".
Just for reference, live USB with old Solus version mounts the "broken" partition without any complains.
Another guess is bad sectors on HDD, but this happened to: 2 internal HDD, 1 external HDD, 1 USB flash drive multiple times. Don't think they broke all together or fall in bad sectors.
Never had this issue before with Solus, it was very stable, till the last new changes.
I can't handle it.
Any ideas?