I think your description is saying that you have been using the Samsung to store all of your files, that IT would not boot and that you have since used a tool to recover all of the files that were stored on it to another drive.
If you are confident you have all of the files on that other drive, you can try erasing the Samsung and then maybe using it for a while with only a few files to see if it can handle some read/writes. You don't say how much you've used it but maybe you've worn it out? SSDs are fast... but they are not forever. Too many writes and they've had it.
You might want to use some tools to check the drive health of the SSD. Some can tell you about its condition and may warn you to replace drive. One simple one on Mac is Apple (menu), About this Mac, System Report... (button), Storage in left list, select the Samsung drive and see what it says next to S.M.A.R.T. Status:
- Verified implies drive is good,
- Failing implies it is about to conk,
- Failed means drive is unusable.
There are some paid apps that can sometimes offer a bit more than that, but the freebie showing either Failing or Failed may be enough. If either shows, buy yourself a new SSD and then copy the files from your backup drive back to the new drive to get things back to how you had them. The new one should be good for the next few years.
Even if you get a "verified," you might want to consider a new one anyway. If you purchased it in 2019 with the MBair and have been doing a lot of read/writes to it about every day since, 4 years is a pretty good while. It might have 4 or even 10 years left or it might be down to its last gasps. A new one will remove about 98% of any such doubt.
Bonus: now that you have experienced a near (data) loss, this is the time to fully embrace a
proactive backup system. Apple's own (free) Time Machine is a very good option to turn on and use. It backs up any changed/new files about every hour your Mac is running. Be sure to get it or something similar going so that
next time you don't have to lean on as much luck that Disk Dill can recover the files. What if it had failed to recover your files?
A proactive TM backup means that Disk Dill could fail and you could still get all of your files back. Key tip: don't make your TM backup live on the same "main" drive as your files. Ideally, it is a
SEPARATE drive so that the main drive (or the TM drive) can fail and the other drive still has your files readily available.
