I'm using the latest and updated LMDE 201204. I'm using an external USB drive (Total size 1 TB) formated as NTFS, I noticed that the drive is getting full. Playing around I noticed something funny, On the root folder of the USB drive, properties gives me that there are xxx files taking about 100 GB, but below it tells me that the used space is about 75% of the 1 TB!
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How can this happen? How to correct this.