Impossible to create a new folder

heworld wrote:

Hello,

I tried to create a new folder but then finder ask me by surprise for my password,

https://discussions.apple.com/content/attachment/a3b32e97-8ab9-4f18-81cd-e4148eb46872

when completed,

finder refuse to create "a new empty folder" because "I do not have the necessary permission", I am the only user of this Mac, I am admin.

//:0

https://discussions.apple.com/content/attachment/d2aa80e2-0655-4997-81fa-390e1bcc80ee

How can I create a new folder again ?

Thank you so much if you know how deal with this it would be very helpful :)

//:0

Resolve issues caused by changing the permissions of items ...

If you are running macOS 10.15 Catalina, then you cannot write to the root of the drive as it is now a protected read-only system volume.

https://support.apple.com/en-us/HT210650