Is it really safe to store anything on the Data (D:) drive?

I've read a bunch of forum posts, but i'd like a direct answer, my D drive is empty, contains 0 files/folders. People have said it might store important backup data but, there isn't anything there, is it still there somehow? I really need an answer as my C drive is nearly full. If you're... show more I've read a bunch of forum posts, but i'd like a direct answer, my D drive is empty, contains 0 files/folders. People have said it might store important backup data but, there isn't anything there, is it still there somehow? I really need an answer as my C drive is nearly full.

If you're wondering, here's my specs:
Operating System: Windows 8 (<-- sadly) Single Language 64-bit (6.2, Build 9200)
Language: English
System Manufacturer: ASUSTeK COMPUTER INC.
System Model: K55VD
BIOS: K55VD.404
Processor: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz (4 CPUs), ~2.5GHz
Memory: 4096MB RAM
Available OS Memory: 3982MB RAM
Update: Thanks for the feedback, it is a physical drive so it is safe.
Update 2: Thanks for the feedback, it is a physical drive so it is safe.
4 answers 4