I have an old 32GB ADATA SP300 SSD. Its a 200/40 MB/s read/write bottom of the barrel SSD, was $20 in 2014 and perfect for a router where it lived 2 years. It finally broke after one more year in retro gaming Windows XP setup with no Trim support. Now writing first 2GB goes at full ~40MB/s but then it drops to .. 2KB/s :D No amount of trimming, zeroing, safe erasing is able to recover it :(. All Smart stats are perfect, including life left.