How To Identify Drive Letters

[ad]Dear Computer Lady,

I have 2 usb ports and 4 slots on the front of my computer. How do I know which on is E F G H etc.

I have an external drive and It uses I but Family Tree Maker does not give me that options.

Thanks, Sara

Dear Sara,

The only real way to know for sure is to plug in your device and see what drive letter it uses. Here is how:

1. Open your “My Computer” window. You don’t mention what version of Windows you are using, but you would either click on “Start” and then “My Computer” or just “Computer”. In Windows XP or older, double click on the “My Computer” icon on your desktop.

2. Take note of the drives listed in the window, then insert your usb or other device.

3. Watch your, “My Computer” window, and in a few seconds, your new device will be assigned a drive letter and appear in the window.

4. The memory card slots will always use the same drive letter, so you can mark each slot somehow for future reference.

A USB device won’t always use the same drive letter, so you might have to check each time.


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Elizabeth Boston is a Web designer, Social Media Consultant and managing editor of, “Ask The Computer Lady”.
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