https://www.crucial.com/articles/about-ssd/sh … u-defrag-an-ssd
https://www.samsung.com/semiconductor/minisit … upport/faqs-03/
Sure, SSD manufacturers are biased (they don't want you to write to the drive, so they'll get less warranty cases), but there's two of them saying: no you shouldn't. Their bias makes it seems worse than it is, you won't noticeably cause wear on a SSD by defragmenting, but you won't get any noticeable performance gains either.

The time you waste even thinking about this will be greater than the time you will gain tweaking any options.

ZellSF wrote on 2021-07-03, 16:41:

The time you waste even thinking about this will be greater than the time you will gain tweaking any options.

Best thing I read today! Lol 🤣 🤣

Once you get to a certain percentage of fragmented files, Windows can start acting funny.

Just because the SSD doesn't care, doesn't mean that Windows can handle massive fragmentation as it sees it.

Anywhere from around 25% to 40% fragmentation and Windows can start having issues.

Higher than that and all bets are off.

All data on SSD is fragmented by design, because it functions like RAID0 massive. There are few exceptions to that though. If SSD in question is using one planar NAND chip, you can expect it to write data similar to how HDD does it.

doesn't mean that Windows can handle massive fragmentation as it sees it.

OS has no access to how SSD handles data internally.

He said "as Windows sees it". SSDs present themselves like any other storage device. Windows will place data as on a HDD, even if it no longer has any relation to the physical layout of the drive. So as far as Windows is concerned, it will cause fragmentation for the same reasons as it would on a HDD. It just doesn't have any performance significance.

Hm, yes. I guess we could say that the SSD doesn't need defragmentation, but Windows dos.
All those "fragments" will cause the NTFS filesystem to become more and more convoluted/messed-up as time wents on.

I sort of doubt that. But for most of us it's irrelevant; Windows 10 handles it fine on its own.