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Can't change File Access Permissions on USB network drive


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#1
onedognight

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I have a USB drive connected to my modem/router. One group of files, which I want to delete, only has access permissions of "Read and execute" and "Read". All my attempts to gain Full Control of this group have been denied in one way or another. In particular, an attempt to Change Owner results in:

 

"The program cannot open the required dialog box because it cannot determine whether the computer named 10.1.1.1 is joined to a domain. Close this message and try again."

 

I have tried other ways to change permissions, all of which result in an 'Access denied' message.

 

The files in question are all components of a manual (.gif, .html, etc) and I have no idea why only this group of files ended up with such restricted access permissions when all the other files on the drive appear to have Full Control access. I'm almost at the point of backing up the drive and re-formatting it but would like to know if there is a simple solution. Thanks in advance.

 

OS is 64bit Win10 Home.

 

 


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#2
dmccoy

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Have you tried copying the file to another drive or location and see if that will allow you to change the permissions?


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#3
onedognight

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When copying to a local drive, full control over copied file is established (because ownership has changed?).

 

When copying to another folder on the same network drive, a 0-byte file is created, which keeps the restricted permissions of the source.


Edited by onedognight, 03 November 2017 - 06:09 AM.

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#4
dmccoy

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To copy or move a file without retaining file permissions with robocopy

robocopy c:/source c:/destination /e
The "/e" parameter tells it to copy all subfolders and files. As there's no specification on how to copy, it'll only copy the files, no permissions or attributes.
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#5
onedognight

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My copy of robocopy doesn't work like that (eg default is /copy:DAT) and, when I google, it seems there are various robocopy variants available. I have tried heaps of combinations of parameters to no avail.

 

So, to re-state the problem:

 

On my network drive there are some secured files and folders owned by the little man inside my router. I can't log on as 'him' to grant permissions and I don't seem to be able to take ownership off him.

 

I would like to solve this problem for interest's sake. However, as a work-around I think I could plug the network drive in as a local drive, re-format it, and then return it to it's network usage. Are there any negatives to doing this?

 

Thanks for your interest in this.


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#6
dmccoy

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Okay, well it was worth a try. Have you tried using roboform with the drive connected directly to your computer? I don’t see any issues with reformatting it and starting over. You could make a backup first if needed. I am not that familiar with Linux but I think you could probably use a Linux distro or possible other programs to change the file permissions. Let us know if you want to explore any of these options.
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#7
onedognight

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A moderator moved this topic for me, from 'Windows 10' to 'Networking' (thanks LiquidTension).

 

The problem ('nuisance' rather than 'disaster') remains as stated in the first post but moving the topic here might lure network specialists. I don't even understand the meaning of the error message "...cannot determine whether the computer named 10.1.1.1 is joined to a domain". I don't have a domain, I have a HomeGroup.

 

The problem boils down to (a) I can't change the owner and (b) I can't give the existing owner better privileges.

 

In fact, something really weird is happening and I haven't fully defined the problem. I'm going to finish this thread and come back when I have a better handle on this.


Edited by onedognight, 09 November 2017 - 05:42 AM.

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#8
onedognight

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FYI (anybody)

 

The problem was caused by encrypted files which only allowed Read access. These were included in a backup source list.

 

Because the destination was a NTFS remote drive, the files Owner got changed to a SID assigned by my router software but the encryption system caused the files to keep their Read access, resulting in files which can't be deleted (Access denied) - except by formatting.


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#9
dmccoy

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Okay great, glad you figured out the isssues. Please mark solved

Edited by dmccoy, 11 November 2017 - 09:15 AM.

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