Forum Discussion
Drein
Jan 02, 2026Iron Contributor
How large is your Windows 10 system's C drive partition?
I want to understand how much space other users allocate to the C drive when installing Windows 10 (e.g., 120GB, 256GB, 500GB), as well as the actual space occupied by the system on the C drive after...
C_the_S
Jan 07, 2026Bronze Contributor
I don't do W10 anymore, no point since it basically out of support, but for W11 I use all of the main hard drive of the system as the C: drive and don't create additional partitions.
I'll add an additional drive for my work documents and files.
If I'm creating a virtual machine then I do 100GB as it's an extreme pain to try and expand it later due to Microsoft's hidden "health" partitions that usually end up at the back of of the drive and if want to expand later becomes a hassle.