📎 AI Summary:
The thread revolves around issues with file permissions on external hard drives used for storing movie files, particularly files that have ended up with restricted permissions preventing modifications or sharing. The original poster, Graham, describes being unable to change permissions due to the permissions being set to "special" and the options being greyed out, hindering file transfer and network sharing. Subsequent contributors discuss possible solutions, including changing ownership of files through Windows' security settings and command-line methods, emphasizing that gaining ownership as an administrator is essential to resolving permission restrictions.

Graham Clinthorne

New Member
Joined
Jan 7, 2014
Messages
1
Thread Author #1
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!!
 

Solution
Windows uses a DAC acl model. This means that any user with administrator group membership can take ownership of files. This is exactly what you will need to do in-order to change the "administrators" permissions.
  • Right-click, properties
  • Security tab
  • Advanced, click Change... Owner
  • Make yourself or the administrators group the owner and apply
  • Then you can grant yourself proper access

Phred

Senior Member
Joined
Aug 12, 2011
Messages
3
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.
-snip-
How'd you go on this Graham? No-one seemed to be around with a response two years ago.
After a 32 to 64-bit upgrade and a file transfer migration similar to FAST, I ended up with permissions all over the place. Some 'DOS' instructions from the command line fixed the problem, but left the computer completely open. A riddle wrapped in a mystery.
Oh for some definition of default directory-tree permissions.
I'll go a-wandering...
 

Neemobeer

Windows Forum Team
Staff member
Joined
Jul 4, 2015
Messages
8,995
Windows uses a DAC acl model. This means that any user with administrator group membership can take ownership of files. This is exactly what you will need to do in-order to change the "administrators" permissions.
  • Right-click, properties
  • Security tab
  • Advanced, click Change... Owner
  • Make yourself or the administrators group the owner and apply
  • Then you can grant yourself proper access
 

Solution