Hey all, Weird issue with my HDDs transfer speeds slowing down a lot. I just recently started using AOMEI Backupper Pro but found the program itself was absolute crap (told it to backup F: drive, it'd backup H: drive instead, memory leaks when verifying backups etc). While backing up I noticed the speed was consistent with normal Windows file transfers of ~140-160MB/s. During this period I got halfway through some backups before it would lock up my computer entirely and force me to reset it. I also cancelled a few backups part way through as it wasn't doing what I told it to. I then got EaseUS ToDo Backup and used that (great program btw) but noticed the speeds were ~40-50MB/s, about three times slower than with AOMEI. I went back to AOMEI to test it again with their software and it was also showing that speeds were now 40-50MB/s. Then I tried copying files with Explorer and that was also about the same. Only mentioning the programs in case one of them maybe changed a setting or the hard locks of my computer may have triggered something. I've checked the controllers in devmgmt and all of them are showing as running in Ultra DMA6 mode. All drives are running on SATA3 ports w/ the proper cables in AHCI mode. The speeds were consistent across all my drives (2x Seagate ST4000TN000 and 4x Seagate ST4000VN008) and none of them have any SMART errors (the 4x VN008 models are almost brand new). Now I've checked everything I can think of and I can't figure out why the computer would suddenly drop the speeds of all drives like this. Backups are now taking ~16-20 hours rather than the 8 hours it was before. All help appreciated. tl;dr drives were backing up @ ~150MB/s, suddenly all drives slowed to ~40MB/s across the board.