Samsung SSD T7 and Mac Studio m2 Max not 100% compatible.
When I reformatted my Samsung SSD T7 4TB in my Mac Studio M2 Max/Ventura with disk utility the read speed dropped dramatically from over 700MB/s to under 300MB/s.
I tried reformatting it in my previous computer (imac 5k 2019 3.6 Ghz 8-core Intel core i9) which thankfully I still have but the error remained.
After some searching, I found a Samsung software that could restore the SSD T7.
(SamsungPortableSSD_1.0.app) But it must be done in my imac/Monteray. If I understood correctly, it cannot be run under Ventura
After restoring the SSD T7 with the software, I did a new format in the imac/Monterey and then the speeds increased. But speed differs..
See photo higher Speeds from imac/Monterey:
See photo lower speeds from Mac Studio m2 Max/Ventura:
I also found out that speed increase if formatting with Mac OS Extended (Journaled) not APFS.
So what is going on new Mac Studio M2 Max can’t handle the SSD:s ?