Free usb hard disk space less than there should be

kesten

Reputable
Mar 4, 2014
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Hi
I have a 1tb hitachi usb hard disk (931 gb), and I have 888 gb occupied, and the free space is 30 gb.
Before that i had only 20 gb free, so i downloaded windirstat and deleted a folder named $recycle.bin and another folder with a name like that, and i freed up 10 gb of space, but i still have 10 gb less free space than there should be
Can anyone help?