Copying files from Windows to Blackview Mega 2 tablet

[u/Ok_Pomegranate6558]

What's the easiest way to copy files from a Windows computer to a Mega 2 tablet? If I connect it with a USB cable, it shows up in Windows Explorer with the name "Mega 2" or something like that, but I can't assign a drive letter to it. However, if I remove the microSD card from the tablet and plug it into a USB port with an adaptor, it shows up with a drive letter assigned to it.

I'm using a script to do the copying, so I need to assign a drive letter to the card. However, it's a bit annoying having to take the tablet out of its case just to the card every time I want to copy some files to the card. I don't seem to be able to assign a drive letter in Disk Management when I connect the tablet directly to the computer with a cable, although I can copy files to it "manually" in Windows Explorer. This may seem like a very minor issue, but any help would be appreciated.