I have been playing on DW20's Mod pack and accidentally put my CAD in my AE2 storage system and they can not be removed.

Quoting from the template you deleted to create this issue

Environment
Include as many relevant details about the environment
A forced crash report by pressing F3+c for 10 seconds. Use pastebin, gist, etc.
Without it, we will automatically close the issue.

Older issue at #4816 with proper info. Hoping to get that one reopened as I and some others have confirmed the issue still happens in 1.16 and above.

please open new one with proper explanation and Link the other issues there, this is better to handle