Media Setting

Dear Nop's
i have issue when changing media storage location from database to file system
after changing stored location all picture " product , thumbs, theme picture" covert it to "Default-Picture" or Empty picture. where is the mistake ???
thnaks

Hello

Can an expert help me? After performing this procedure, the operation did not complete successfully. The database has not been completely moved and an error message has appeared stating that the process time has expired. I reset the settings as they were for storage in the database.
As a result, many unreal products appeared. Is there a way to reset the database as it was? How to remove fake products from appearing in the store.
Is there a procedure for reorganizing and cleaning databases from unreal data?

Thanks