How to increase my partition?

I installed OMV and my space in my partition enough.
How can i increase?

12

@Ben_Askeloni What My Cloud or WD device do you have? Is it this WDMyCloudImage ?

Yes

With a clean Debian install…?

I.e. you’re using the MyCloud hardware, but have entirely replaced the firmware?

If so, you may want to ask your question, or look for a solution on this thread:

As i said i installed OMV from here