Windows 10 Pro, i7 machine.
I have a 2 TB external HD with 500 GIG of free space. Suddenly the drive had 0 free space. I erased about 50 GIGs of old files, but when I started the computer the next day I had no free space again. After erasing many folders and creating more space this problem has continued. When I installed Kaspersky after some failures to enter the external HD karsperky entered and did a disk check but before and ever after kaspersky announces that the check of the external drive lasted 2 seconds and checked only one or two files, as if the external drive had only one or two files. The External disk has one and half terabytes of data. I installed and run Treesize software but did nothing to solve the problem.
Any help will be much appreciated