[PaulKeeble]

Files aren't stored sequentially in an SSD anyway, they are scattered all over the place physically on different blocks just due to the way SSDs work. This doesn't hurt their sequential read performance at all since they have no seek time they already have a lookup table from the physical block the OS sees to a virtual location within themselves.

However one thing I found out a few years ago is that old data can be slow to read as a lot of error correction kicks in. Additionally a lot of fragmentation at the operating system level in Windows has quite a bit of overhead. It can seriously degrade performance to about 50MB/s sequential reads. In practice defragmentation/rewriting of certain high write files may be necessary on SSDs because Windows read performance degrades at high levels of fragmentation.