[Moto G4 Plus Questions & Answers] Frances91:
[Scroll down to the end for the TL;DR of my $ 0.02]

As someone who's had bad luck with failing flash drives a few times, specially ones which were crucial to work, can really understand how frustrating it can be of you're stuck with a bad disk.

Before going further, based on my own experience, I'd say given chance that the drive could be failing, it's advisable not do anything that might write on the drive. Any OEM or vendor tests or repair utilities, are likely to cause more harm than fix things back up. This obviously, is if you've data on there you'd not want to lose. Second step from here would be looking for VID captured through SMART to ascertain exact manufacturer, this could be important consider the flash storage within the card is from a vendor other than the company that sells the card. Depending on how much, possible data loss, could cost, you could consider getting professional services specially if the device your disk was tied to is enterprise managed. If not so, then cost of recovery could be several (hundred) times more than cost of the disk.

Using software available online, even ones which are paid, could offer only a brute force level hit and trial data recovery, with their very limited functionality. Most, even ones such as icare or easus have mostly been built around standard SATA drives, which are far more notorious with retaining data after several rewrite cycles. Even SMART is still largely in the ide/sata domain. But if your data isn't life or death crucial you could give it a shot. On lucky days I've recovered entire partition with tools as basic as Recuva, though of course after the format has been fixed.

Fixing the raw error ideally should get dealt with by the wonder tool Rufus, but as you obviously would have figured it that would happen at cost of data loss. Though Rufus can be counted on last ditch efforts to salvage the disk by fixing bad sectors. Being available across platforms I've found it to be my GO TO tool for all things related to flash drives, specially when I have to try a new distro or mount an old one out of the blue. The only catch I can think of is the disk not being read via USB adapter, which I've found getting fixed with using a standard SD adapter and connecting via MTP.

The ideal flow of data recovery: copy image, mount as virtual partition, followed by Sector level scan for recoverable fragments is going to depend on your disk not having physical failure, as the last user pointed out too. In which case, it would be a case of coat vs risk assessment. Most vendors are happy to return the disk or give a replacement, but that being the worst case scenario, so perhaps it would boil down to deciding between bearing cost of a new memory card or risking compromising private data, that should be the clincher. And the experience and the knowledge gained in the experience as the silver lining.

TL;DR: buy a new one in favor of safeguards personal data, be severely critical of Manufacturer, seller, Amazon et al and get a free replacement without return citing privacy issues by giving hell to the call center kid

OR format to a readable version with chance of permanent data loss by Googling for RAW error fix, and torrenting a suitable program for 'evaluation' and get done with it.