Is there any chance to at least revive the filesystem to read-only state for getting the data saved? In question the loss would be no disaster for me, but sad. Most stuff is backed up, the data I didn't back up recently can be recovered anyway (indie and Steam games, bit of music) and the rest is lost (photos). If there is a slightly chance, but it sounds more like it's a drag completely.
I couldn't say, the one who can answer you best is Geaves.
Either way I will switch to a more secure solution and the Sharkoon box + the HP PC will be sorted out.
I was looking last weekend to buy a pcie to sata adapter and after doing a little research I came up with a list of chips that may be suitable. I posted it here. RE: Unexpected disk errors seen with PCIE card when adding more than 2 disks