A simple open-source disk benchmark tool for Linux distros
KDiskMark is basically a clone of CrystalDiskMark, you can grab the AppImage version from releases and should be self explanatory if you're used to CrystalDiskMark on Windows
NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.
Why is downloading and verification so slow with my SD card?
1 project | reddit.com/r/SteamDeck | 13 Aug 2022
Cheap 1TB SSD for $102 First Impressions: GIONEDA M.2 NVMe 2230 1TB SSD
1 project | reddit.com/r/SteamDeck | 10 Aug 2022
Is it possible to test MicroSD speed on the Steam Deck?
3 projects | reddit.com/r/SteamDeck | 3 Jul 2022
Internal SSD and SD card benchmark
1 project | reddit.com/r/SteamDeck | 9 Jun 2022
If you're using ntfs filesystem enable ntfs3 for a 20-40% read/write speed boost.
1 project | reddit.com/r/linux_gaming | 19 Apr 2022