Impossible to login via Web Inteface, SMB access working good

[TMSupport]

What's your current TOS version?

[TOSMC]

Current TOS Version is: 4.1.30

[TMSupport]

It may be lost because of the HDD with bad sectors.

[TOSMC]

I'll try to explain better the problem.
The "admin" folder and it's contents are visible and accessible both via web interface or via Windows Explorer:

Explorer.jpg

WEB.jpg

If I go to TOS Control Panel – Privileges – User – select the user and Edit – Permission
I can see all the folders, except the "admin" folder:

WEB_Control_Panel_User.jpg

Same thing on TOS Control Panel – Privileges – Shared Folder:

WEB_Control_Panel.jpg

Why it isn't visible there?

Moreover, the folder and it's content (all the subfolders and files too) is fully Readable/Writable via Web interface, but in Windows Explorer it is fully Readable/Writable only in the first level of subfolder:

Explorer_Subfolders.jpg

While for the other levels of the subfolders I can't paste, create or edit files and folders; I obtain always the following error:
-in Italian
Per eseguire l'operazione è necessaria l'autorizzazione
Per modificare il file, è necessaria l'autorizzazione da Unix User\sync
-in English (translated)
Authorization is required to perform the operation
To edit the file, permission from Unix User\sync is required

Explorer_Error.jpg

Why this strange behavior?
Before the problems described at the beginning of this thread, all was working perfectly!

[TMSupport]

admin folder is not a shared folder, so it will not be listed under Privileges- shared folder. It's an user folder.

[TOSMC]

OK.
Anyway from the the second level of subfolders of "admin" their content is not writable in Windows Explorer.
How can I resolve thi issue?

[TMSupport]

Could you change the permission of the subfolder? What's the folder name of the subfolder?

[TOSMC]

If I try to change the permission form Windows Explorer I obtain the following error: "Invalid handle".
Trying to change permission from web interface leads to a very strange behaviour:
Is not possible modify or deleting nothing, always the following error is displayed:
"Authorization is required to perform the operation
To edit the file, permission from Unix User\sync is required."

While is now possible to copy files/folders but then if I try to delete this new items after copy I obtain the following error:
"Authorization is required to perform the operation
To edit the folder, permission from S-1-5-21-1592483829-1745751381-2453141439-1006 is required."

After permissions change, all folders and files are affected by this problem, at any level.
Some folder name: "Documenti, "Collegamenti Internet", "Progetti"

Here the screenshot from permission change on web interface (applyed to all subdirectories):

Permissions.jpg

and a screenshot for the permission set to subfolder "Progetti":

Permissions_Progetti.jpg