Care Of Old Coins?

I guess it depends on the condition, if I have been listening to my more knowledgeable friends here.

I am interested, as well. What albums are preferred for storing coins, to preserve their value?

There are other types of albums that are more money that are better. The Whitman classics are better. They have a plastic slide that keeps the coins in place on obverse/reverse. The problem with these are that if you slide the plastic many times, you can scratch the higher parts of the design on your coin your trying to protect. Dansco Albums are also as they have the same design, just a little stronger pages in side the album. If you are filling a book it is best to have the coins all in a row and limit the sliding of the plastic as possible. Also check from time to time to see if the plastic is covering all of the edges of the coins. They may move and some coins are exposed to air and may turn an undesired color. So best to check them occasionally especially when you look to show to another collector, before you put the book away, check then to make sure all is safe before storing them.
There are also plastic covers for coins called air tights. The holder is a two piece construction that encloses the coins. The problem with these is storage. as they will not usually fit into the 20 page holders for 2X2. They may make holders that I don't know about. Then there are the nice Plexiglas holders. They are usually the same size 2X2 as the cardboard ones, but they are thicker. The fit very tight in the pages. They actually stretch out the pages and a regular 2X2 cardboard one is harder to re-use in the same page. But storing them in boxes is a better means for them.
Coins don't like too much heat/moisture/light. All these will age coins too fast and ruin their collect ability. Copper may turn green with too much moisture, pit and make more of an eyesore for your collection. Too much heat will hake the coin tone to different color than it was at first. Air can turn some coins (silver) yellow if they are not kept from this element.
Slabs are another way for collectors to store their coins. But these cost extra to put them into the holder and identify them. The grading cost may excel the value of the coin. So you may want to just use this for high dollar coins. If the coin is worth the expense then one might choose to go this direction. I'm sure there is more, but this is what I can think of. Others may add to this.

Again, Welcome to the forum. Mostly lots of answers already. You still did not explain what type of albums or folders the coins were in so many are assuming you are saying folders. If already in Albums, plastic slides to see front and rear of coins, all is OK. Of course this also depends on many other factors. For example Whitman and Dansco are usually safe for coin storage. There are numerous others than may not be so great on the coins for long term storage. Also, invironment is another factor. Regardless of the container, if you live in an area of excessive humidity, acid rain, high carbon dioxide content, etc. your coins may not last. If you have a pool and you use Chlorine and the air in the area has that in it due to normal evaporation, that also will effect some coins.
You may encounter statements on the internet as to your coins becoming full of PVC or Verdigris. These are terms used by people that have heard them and usually not sure of what they mean but like the sound so they too reuse them. Just look up such words and you'll see. Example if you go to a hardware store not the massive amount of PVC for household water pipes. Think of all the people that will now have PVC lining their stomachs
Until you learn exactly what you have, what you want to do with them, here is a simple suggestion. Protect what you have the easy way. Place each album in a Freezer type Zip Lock bag, press out as much air as possible. Actually this should work for about 50 to 100 years. After that if the coins should start to tarnish, just let me know.
Your original question is will the albums deminish the coins value. NO and you should not be worried just now about the values, just what you have. Your Grandmother took care of some of those coins for many, many years so if they are still in great shape she mush have known what she was doing.