1TB SSD
No signs of issues before one day the computer simply wouldn't boot. I tried updating the BIOS first, just in case, but it had no effect.
I put TestDisk on a USB drive and I ran the deep scan, which took like 4 hours. It showed two NTFS partitions and said "the following partitions can't be recovered"
There weren't any options, except to "Continue" so I pressed Continue with the larger partition highlighted.
I get this screen:

I don't know what I'm supposed to do next. How do I know what letter I'm supposed to put next to each partition?
My hope is to get it to boot once, put in a thumb drive, and transfer off everything I can get. I don't know if this is a realistic goal.
I've ordered a new SSD, but it won't be in for a couple days.