问题
What happens if I finish the drive letters? It's just curiosity, but I have a lot of letters and it happens that I float around 20 when I have everything connected
回答1:
This image is not mspaint. I subst'ed all drives, even B:
Then, I plugged a card reader that has 4 drives. Nothing showed up! So, the answer to your question is NOTHING! You are just unable to add more. Of cource you can use volume mounting as suggested above
回答2:
It depends on your operating system. Some older versions of windows supported up to 32 drives (mapped to things like [: and `:), but more recent versions do not.
On a modern Windows machine, if you require more than 26 drives, the correct solution is to use Volume Mount Points
来源：https://stackoverflow.com/questions/4652545/windows-what-happens-if-i-finish-drive-letters-they-are-26