Question about SanDisk Desk Drive

Hello,

I'm at 1460 MB/s write and 870 MB/s read with the Blackmagic test.

I use this as a backup and have also backed up other data on it. However, the write speed should have far exceeded the 140MB/s. The official speed is 900MB/s. The storage medium is attached to the Mac M3, which certainly also has an influence on the higher write speed.

I can't answer that. For me, it's used for daily overnight security, and that's where I sleep.