Photo preservation questions

Hello all!

My grandfather recently passed and we found a collection of old family photos stored in [cardboard frames like these](https://www.avidvintage.com/products/vintage-family-photo-cardboard-frame-idd-bruensbach?srsltid=AfmBOorZdBWvVW-W76Bs1\_LNc5Xrk3ZFzr4Au7NFRZYxkZECHVzZqUf8). (if the link isn’t working the are the paper/cardboard frames a lot of photos from late 19th/early 20th century got stored in from photograph companies).

I went to school for archival work so it is very likely that handling them going forward will be come my responsibility. I am fairly certain they are not safe to store the photos in long term but am hoping for some advice for what to move them into/maintain records of who is in the photos that have worked for others.

Any advice or redirection to resources that could help is deeply appreciated!!