sorry on the picture you can not see anything, it would be better if you make a screenshot
if you search in folders or even on large hard drives, the search takes a long time and it looks like the Radioboss has crashed.
I can only advise you to add your songs in the database
Once you have added your songs to the database, it is no problem to search for them in the database.
or use an external program to search like Everything
Everything is a search tool for NTFS file systems. The software offers indexed file and folder search with real-time updates and straightforward user interface. Everything supports wildcards and RegEx for search terms.
Here you can download Everything: Everything