How to access Android phone files transferred to PC after phone lost?

[PCluddite]

Help. Please can anyone advise how to retrieve phone messages downloaded to a PC. Samsung phone to HP. Was using a cable to transfer. Now the phone is lost. Is there anyway to access the contents of the phone on the PC? Contacts saved. Want to access photos and dictaphone recordings that were made with an app on the phone. No cloud, all on the PC. All going over to iPhone so not a case of getting a new Android and doing the transfer.

Thank you.

How did you transfer the files to the PC? Using Samsung's Smart Switch app, dragging and dropping the files from the phone to the PC, or some other way? Also what apps did you use to take the photos and create the phone recordings?

Thank you. Helping a family member. They are not completely sure what they used. To do the transfer they plugged the phone into the computer with a cable and clicked BackUp.

Not sure if PC World or similar can help. In fear of erasing anything since the phone is lost.