Delete "stuck" folders.

[videoed]

Posted this in another area but it may be better here.
I have several terrastation TS-XL with firm ware 1.75.  On two of the units I am experiencing a strange behaviour with several folders on two of the drives, one on each unit.  I cannot delete the folders.  I can copy files and folders into them and the new ones will delete but when I try to delete the "stuck" folder the files inside are deleted but not the folder itself.  No error messages at all.  Tried with several file managers all with same result.  Tried on a PC with Win 11 and one with windows 10.  Is there a utility or such that can directly access the files and folders on a Terrastation? or any idea how to delete the folders.  Each unit is set up with 4 2TB hard drives as just drives, not raids.
Thanks for any help.
Esa.

[doobre]

Hi there, I've had stuck files before, usually a restart of the nas will help it sort itself out, if not then a RESET will definitely do it. You will not loose any data with a reset, only with a full erase, but it is recommended to backup anything you can't afford to loose to another drive, before you start anything, just in case a drive fails (or whatever: power cut, brown-out etc.) to be double sure.