You've already done the most important step, scanning the photos and slides!
The next important thing is to store them in acid-free containers away from sun and moisture etc. and to back them up somewhere outside of your home. If you simply want storage use inexpensive photo-safe boxes or plastic containers available from Michaels/Hobby Lobby etc. or you can buy expensive professional storage containers online.
Here is some information I found online when I searched using Google.
https://www.thespruce.com/properly-store-old-photographs-148003
http://www.home-storage-solutions-101.com/storing-pictures.html
http://www.wikihow.com/Store-Photographs
https://www.archivalmethods.com/
http://www.ccaha.org/uploads/media_items/storing-your-photographic-collection.original.pdf
After scanning, I sorted my thousands of family pictures into various categories and placed them into different sized photo-safe plastic containers such as these:
http://www.michaels.com/recollections-photo-box-16-cases/10174559.html
http://www.michaels.com/-iris-scrapbook-case/10373070.html
You can also use acid-free cardboard boxes, photo-safe envelopes and plastic sleeves.
Currently I have all my photos stored in containers, uploaded online, and backed up on portable drives since I am the unofficial family historian.
In the past I have prepared cds with photos for family members, used digital photo frames and made photo books for others using places like Shutterfly. Don't let all your work and your family history sit in storage![/Q
"Thanks so much! I will be getting started soon. Sorry I didn't respond before this, the time seems to have gotten away on me. I was wondering ... if you store pictures in an acid free container (like Michaels), should a piece of acid free paper be placed between the pictures?
Thanks again!