Thanks for the response. These may be a type of salvage file, but the file extension is specifically .RSV. I have seen that threat you linked before when I was researching my particular issue, but I don’t see a “salvage” function on the X70, the closet being the database repair, which doesn’t seem to do much to fix my issue.
A little while ago I came across an AXSM utility that allows the clip recovery of .RSV files as “reserve files,” but the program is looking for a piece of Sony hardware, so it won’t allow me to proceed further. (Investigating further, it’s for an F5 or F55 recorder.)