Re: something or nothing....
"ever tried deleting/moving/modifying a file on a network share that you only have "read" permissions to?"
Those file you only have read permission to - how did they get there? Could it be that someone has to have write permission?
On a more practical, albeit longer term scale alternatives to simple shared folder need to be looked at. As one approach I'm currently setting up Nextcloud at home. I have several alternative ways to share files with a client. One is to use the webdav client to sync a specific desktop folder with the server. That means that even if I had a ransomware program running wild on the client PC it could only (a) affect files on the synced folder and (b) the contents of the folder on the server are versioned so that the last good version can be restored.