The drive in question is a Samsung 500 GB Samsung EVO 850. Samsung Magician says the drive is good. There have been 354 TB written. I believe the drive is at least 8 years old.
Lately HD Sentinel has been reporting consistent sectors being reallocated. For the month of October 80 sectors were reallocated for a total of 145 that have been reallocated.
(Sorry about the line breaks creating the extra space. I am not sure how to get rid of that.)
Here is a brief history from the log.
11/1/2023 10:45:34 AM,#5 Reallocated Sectors Count 144 -> 145
11/1/2023 1:15:11 AM,#5 Reallocated Sectors Count 143 -> 144
10/31/2023 7:28:19 PM,#5 Reallocated Sectors Count 142 -> 143
10/31/2023 7:46:46 AM,#5 Reallocated Sectors Count 141 -> 142
10/31/2023 3:40:42 AM,#5 Reallocated Sectors Count 140 -> 141
10/31/2023 3:30:40 AM,#5 Reallocated Sectors Count 139 -> 140
10/31/2023 1:45:16 AM,#5 Reallocated Sectors Count 138 -> 139
10/31/2023 1:40:16 AM,#5 Reallocated Sectors Count 137 -> 138
10/30/2023 8:13:11 PM,#5 Reallocated Sectors Count 136 -> 137
10/30/2023 10:31:28 AM,#5 Reallocated Sectors Count 135 -> 136
10/29/2023 11:32:55 PM,#5 Reallocated Sectors Count 134 -> 135
10/29/2023 3:01:36 PM,#5 Reallocated Sectors Count 133 -> 134
10/29/2023 11:20:46 AM,#5 Reallocated Sectors Count 132 -> 133
10/28/2023 12:42:09 PM,#5 Reallocated Sectors Count 130 -> 132
10/28/2023 8:31:29 AM,#5 Reallocated Sectors Count 129 -> 130
10/28/2023 8:21:27 AM,#5 Reallocated Sectors Count 128 -> 129
10/27/2023 5:22:07 PM,#5 Reallocated Sectors Count 127 -> 128
10/27/2023 2:26:43 PM,#5 Reallocated Sectors Count 126 -> 127
10/26/2023 10:34:41 PM,#5 Reallocated Sectors Count 125 -> 126
10/26/2023 7:39:15 PM,#5 Reallocated Sectors Count 124 -> 125
10/26/2023 5:48:58 PM,#5 Reallocated Sectors Count 123 -> 124
10/26/2023 12:48:08 PM,#5 Reallocated Sectors Count 122 -> 123
10/26/2023 9:23:56 AM,#5 Reallocated Sectors Count 121 -> 122
10/26/2023 9:18:53 AM,#5 Reallocated Sectors Count 120 -> 121
Your drive has a 150TBW endurance rating.
You have more than doubled that and are now relying on reserve sectors every time it encounters ones it can no longer erase. This is a form of failure but is the most predictable and graceful one. Consider it more like your drive is being consumed, not necessarily dying. It’s just getting worn out.
If you stop writing to it it will probably continue to work but you should obviously replace it and not run an OS or games off of it anymore. A music library (with the live-updating database files (for logging plays/etc/whatever being stored elsewhere) would be fine to keep on a drive like this or anything read-only. One way to potentially extend the life of it would be to empty it and do a secure erase on it, then do some over provisioning if possible or just quick format it at half capacity so it has lots of room for optimizing wear leveling from now on. The fuller a drive gets the less room it has to do wear leveling. It’s possible you’ve got tons of write capacity left on the drive and after erasing you might stop seeing the reallocations rise with normal use but I’d minimize writes to it regardless.
Go spend $50 on a new 500GB 870 Evo, clone to that, and retire the 850 until you find a low-write use case for it.