Which M7? Z170, Z270, X370 etc.
I just want to read the manual. If it is an AMD, please update bios as USB has been an issue.
DiskPart is a tool to edit disks, but the bios must tell the system that the USB drive is removable.
Removable or not doesnāt really matter. Example: if you plug in an external SSD, it does not show up as removable and there is no option to eject. Just close Engine Prime before disconnecting it. I do it everyday.
Yes it does. If your computer marks it as an internal drive, you cannot format it as exFAT (via normal GUI method), but only NTFS. I think the drive might be seen as UASP like thunderbolt.
We had a forum member that had it the other way around. All his internal NTFS drives were marked as removable. Engine Prime didnāt do well. 
True, which is why you need a 3rd party formatter like AOMEI to format the drive to FAT32 or exFAT. Windows wonāt allow it for larger drives via itās built in format utility, but it can be done.
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Yellow crosses? 
Then Iād suggest a complete wipe of the drive, then reformat to exFAT. Maybe thereās some GPT lingering somewhere.
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I recently bought a Prime4 white(2.1)+Lc6000. Inside , a blank ssd Crucial 2Tb. On controler mode, Win10 (Asus/Xmg15 dj), the ssd is not visible on the screen. In the same mode, I connect to a macbook air (mojave), the ssd appears on screen and I could format Ssd. I re-connected to laptop Win, the ssd appears on screen and recognised. I donāt understand. I have not yet use the ssd in standalone with Engine Dj.
What file system is the drive formatted to?
Needs to be MBR and not GPT file format exfat and not fat32 for SSD
Thanks for your precisions. It is good in Exfat. In fact, the SSD must be partitioned in the management of the Win10 computer (ssd detection). Itās the same for live MPCs. Then it should appear on the screen in prime 4 controller mode. Bye
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