How can I fix this computer, save, permission

I wanted to save a text document and then this turned up. Can someone please tell me what that means? Who is meant by administrator? It's actually about installing a very specific plugin in Audacity. For this one had according to several sources a kind code or so (do not know me) from the official side to copy and paste into a text document. The whole thing should then save in the plugin order of the software but when I try this message comes up. Incidentally, the laptop belongs only to me if this is meant by administrator, but how can I save it there now?

You can change the permissions on the folder. https://www.dirks-computerecke.de/anleitungen/zugriff-steuern-ordnerberechtigungen-bei-windows-7-setzen.htm

But it is easier to copy the file into another folder first. Then change the copy and then copy it back afterwards.