The system has xp/win7 and win10 x64(mostly for backup and things that don't work on xp/win7) installed on the SSD. The issue is present in windows 10 (the update problem/latest version of SM) and the blocks can't be fixed also (read error). Also i tried resizing the windows 10 partition (have 4: xp, win7, win10 and storage) which was working before the bad blocks appeared and i get the the same 'read error' at ~80% of the process, so i really think it's a hardware issue.
Firmware update worked on windows 10 with internet connection from my phone and also one bad block went away, thank you.
In your place I would quickly make a backup of that SSD! Especially if there is data that you do not want to lose. Keep an eye on that reallocated sectors value, if it gets even higher now, then your SSD is dying. Then you have to RMA it to Sammy.
Don't trust your precious data to a sick SSD! A man forewarned is worth two.
Bad blocks are not gone, they are only internally marked as unusable. What is lost remains.
The bad blocks are then replaced by spare blocks, but they will run out at some point.
Many people still wrongly think that bad blocks are suddenly gone... They are not, they are replaced by spare blocks, the bad ones stay and never go away.
Anyway a good SSD should never have bad sectors... Whenever you see this, then backup, backup, backup! At that moment just as an old HDD, you have a bomb ready to explode in your hands. I would never trust such an SSD or HDD in my business, and my customer's. I have enough experience with this in about 30 years.
You have a greater chance of losing everything from data, the longer you postpone everything with such an SSD.
But if you like playing on the edge of the abyss, go ahead! And i say it again; A man forewarned is worth two...
Prices are currently spectacularly low for some SSDs right now, so I wouldn't wait for to pay double for that.
If you see this on any HDD or SDD, i wish you good luck...
In this case an SSD with 329 bad sector's, do i need to say more?