Can't Turn a TM Backup disk into a Regular disk

[MacDaddi]

OK I'm no newbie but this one has me stumped. I can put file onto a Time machine backup disk that I don't use as a backup anymore but I can't take them off. The Disk still has some backups on it that I would like to keep. But I would like to use the extra space for regular file storage. What gives. When putting a file on the disk it asks for the password but moving them to the trash it will delete everything in the folder but it won't actually delete the root folder.

So my question is
1. Can I use the disk and keep the backups on it?
2. How do I get permission to read and write to the disk

 

[spinnerlys]

Yes you can use the disk with the back ups still on it.

Is Time Machine switched off?

For permissions to read and write, select the HDD, Get Info (CMD + I), and look under Ownership and Permissions, if your user has all the rights. If not, you can set it to.