Hello,
In daily use, people are often suggested to save backups of mobile phone contacts, photos, messages and files on different storage devices and locations as possible as they can. However, if you do unfortunately delete or lose them by accident, also do not panic.
If you do have at least saved one copy of them on the phone Micro SD card, you are still able to recover contacts and files from phone memory card with phone memory card data recovery freeware.
Hence, plug this phone memory card to your PC and go perform a deep scan there with the help of data recovery freeware.
Honestly, as long as these original files are not corrupted completely, they often can be restored back with ease.
Just read more details here:
https://www.icare-recovery.com/howto/samsung-galaxy-android-phone-data-recovery.html