Hello @joseyanna, and welcome to the forum!
If you have that brush only with the ending “Copy”, then you must have deleted the original Preset.
Please go into the dialog you find via ‘‘Settings’’ >> ‘‘Manage Resources…’’
There do the following:
After you have set it up like this, you should be able to see the deleted “Basic-5 Size” and can undelete it with the big button on the right side. On my screenshot, it is greyed out and says “Delete Resources” but will switch to undelete if you select the resource to undelete.
Michelist