going to revive this thread cuz i have a slightly different problem
I bought an internal HDD and stuffed it in an enclosure. enclosure has a USB 2.0 port and an eSATA port. It was working fine with the USB 2.0 connection. I could copy, delete, write files onto the drive. When I used the eSATA port I get the "Disk is Write Protected" warning. "Remove write protection or switch to a different disk."
I tried rkulp's method, I even added more 'control' to other users but the moment I click Apply or Ok. my computer gives me a grand list or files that are still write-protected, one pop-up at a time.