Downsize iSCSI or Win7 issue

Hello, I would like ask you whether there is a chance to downsize iSCSI on MyCloud EX2 ?

My story happens when Windows 7 tell me, that there is no space on F: (mapped iSCSI volume). Then I expanded size from 1000Gb to 1400Gb (done by MyCloud web interface). But problem remains, windows 7 still notice me there is no space on F: (but volume is enlarged to 1400). I dont know, it is a problem of Windows 7 x64 or is it another limitation?
As simplest solution I decided to downsize 1400Gb back to 1000Gb (or little more 1100Gb) and create next iSCSI target. But I see, downsize is not possible? even not working thru web management.
How can I proceed to fix first, second, or likely both issues?

thanks you a lot :slight_smile:
KPr