With your continuing issues and this:
Apr 6 11:36:13 Tower kernel: BTRFS error (device sdc1): bdev /dev/sdc1 errs: wr 0, rd 0, flush 0, corrupt 2042, gen 0
I'd start by running memtest from the bootmenu for at least a couple of passes (By and large "corrupt" on a btrfs drive is because of memory issues)
If you're booting via UEFI mode, you will have to temporarily switch to Legacy mode in order to run the memtest