File name structure

 I purchased the Adobe Photoshop Elements and Premier 2021 and a new laptop. I’ve been working with Version 11 on my old laptop. I followed the directions to back up my catalog to an external hard drive and restore to the new laptop. In trying to import the backed up catalog to the new computer it changes the file name. How to I keep my previous format? Additionally, I tried to restore the catalog to the new computer but there is not enough memory to store the pictures. Is there a way to keep the picture on the external hard drive and the catalog on the computer?