I have an external hard drive I use to store movie files I have transcoded from DVD into .mp4 format. I used up most of the space on a 1 TB drive, so I am importing files to a 2 TB drive. there are nearly 200 files that did not successfully transfer- which I have determined to be caused by a lack of file permissions. It turns out that those files (somehow) ended up with special permissions rather than full read/write access. I don't know how this happened, but I am unable to change the setting. opening the properties>security>advanced>change permissions dialogue shows the list of allowed users. SYSTEM has read/write access but administrator (me) has only "special" access. When I try to interact with the checkbox list to change permissions, all the options are greyed out and I cannot click any of them. I came to this website since a google search of my problem turned up this old thread. I am having a similar problem, except that in that case, the user was able to interact with the check-boxes to add privileges, whereas I cannot. It is possible the files are somehow corrupted, which would be rather disappointing as I would be left to re-transcode nearly 200 DVDs (a process that took me most of a summer). The lack of permissions (I think) is also causing me to be unable to share/stream these files on my local network and is the root of a lot of other nagging little problems for my home theater setup. Solving this would be a huge boon for me- I'd appreciate any help thanks!!