I have a weird one here. I just bought some more sandisk extreme pro flash drives because the 3 I bought last year are amazing and work great. I plugged in the new drive today to format with rufus and I kept getting format errors. I started looking closer at the drives in device manager and the new drives are showing up a SCSI Disk Device, while the old drives are USB Mass Storage. In Sandisk Dashboard the new drives show up as a 240GB SSD Plus. Are they shipping new drives with the wrong firmware? I’m so confused Sandisk.
This normally happens with the drive get’s a controller update in order to achieve higher data transfer rates. e.g. SCSI (Fixed) Disk allows higher rates than “USB Mass Storage (Not Fixed). Also, SCSI (Fixed) Disk are NOT BOOTABLE which could be the cause of your formatting issue with Rufus.
The Sandisk Dashboard doesn’t support portable SSD so the drive and SSD may show up incorrectly.
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Windows sometimes shows new SSDs as “SCSI Disk Device” even if they are SATA. If Sandisk Dashboard sees it correctly, the drive is fine. For your flash drives, format errors happen if there’s old formatting. Just use Diskpart (diskpart > list disk > select disk X > clean) and then format again.
