Using Windows DISKPART Utility to set a VOLUME to READONLY

Plenty of help on web sites re using the diskpart utility.
https://appuals.com/diskpart-manual-commands-and-instructions/
https://superuser.com/questions/491756/what-do-the-readonly-attributes-in-diskpart-really-mean

1. Windows > run > cmd  - to open a command prompt
2. diskpart <enter> - to open DiskPart utility tool
3. list volume <enter> - note the volume # of the target disk
4. select volume # <enter> - to select volume
5. attributes volume set readonly <enter> -- eject USB and plug back in

to undo readonly 

5. attributes volume clear readonly <enter> -- eject USB and plug back in 

Use 'attributes volume' to simply list the arributes on the volume

--

Volume or Disk? - the disk settings are stored in registry so PC specific
- while the volume attributes are stored on the disk so travel with the disk
https://superuser.com/questions/491756/what-do-the-readonly-attributes-in-diskpart-really-mean

MS Documentation
https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/diskpart

** NOT THIS ONE **
** attributes disk [{set | clear}] [readonly] [noerr]
> list disk
> select disk 1
> detail disk
> attributes disk
> attributes disk set readonly
> attributes disk clear readonly

** YES THIS ONE **
** attributes volume [{set | clear}] [{hidden | readonly | nodefaultdriveletter | shadowcopy}] [noerr]
> list volume
> select volume 1
> detail volume
> attributes volume (lists all attributes for the selected volume)
> attributes volume set hidden readonly
> attributes volume clear hidden readonly