i have a 1 tb extreme model and am wondering about it since it never really got the speeds it was supposed to. Admin said:WD says that it is readying a firmware fix for a frightening SanDisk Extreme Portable SSD sudden failure issue, but it only mentions ups for 4TB users. https://forums.sandisk.com/t/sandisk-extreme-portable-ssd-v2-sandisk-extreme-pro-portable-ssd-v2-and-wd-my-passport-ssd-external-drive-firmware-update copying from an ssd with 3.5 gb/s read speeds and it only transfers at about 50 MB/s ??? i have a spinning hdd that is faster copying from the same drive and does it at about 100 MB/s. wonder if that has anything to do with firmware issues. it has never gotten anywhere close to the 1 GB/s it is supposed to get,. (and yes it is plugged into a nice fast USB-C port. )

SanDisk 4TB Extreme PRO Portable SSD, USB-C USB 3.2 Gen 2x2

It says my disks are not affected, but just out of curiosity I made up several serial numbers and all of them said it had not been impacted, so I don’t know if the tool is accurate. Some unconfirmed chatter suggests that the SanDisk Extreme SSD issues affect only those using devices "manufactured after November 2022." Still, at the time of writing, we would advise anyone using these drives to use them with extreme caution. Perhaps it is advisable to only use these storage devices for convenient duplicate or temporary data until the fix arrives and it has been tested well.