Gene, I never noticed or heard of that before. If these pictures are special to you may I recommend multi-copies over various media with a disk and a thumb drive at a minimum. The estimated life cycle of storage media is still in its infancy stage and are only approximations/estimates/guesses. No one really knows what the future may bring. So why not give yourself a little insurance by doing so. You may consider free on-line storage also. DA

I have only 4GB cards, but I did find this: SDHC cards use the same physical format as SD cards but cannot be used with SD host devices that do not comply with SDA Specifications Version 2.00. Current SD cards complying with Version 1.01 and Version 1.10 use either the FAT12 or FAT16 file system, whereas Version 2.00 uses FAT32. This incompatibility could explain your problem (FAT is File Allocation System). Now...I have to check the specs on the card slot on our laptops. I almost bought 8GB cards the other day.

I have an Old Acer Android Tablet (Acer Iconia A500 w/Android 4.0 Ice Cream Sandwich), but it does show up as my Tablet (A500) in Windows 10. I can then access my photos and all other folders and files on the tablet. My Phone is a Windows Phone with Windows 8.1. I have no problems whatsoever connecting with the phone either! I have Windows 10 on my Desktop Computer, 2 Laptops and my Acer Iconia W4-820-2882 Tablet. All my Appointments, Photos, Documents, etc... are shared between them without lifting a finger. Just hooked up the Acer Iconia A1-840FHD w/Android 4.1.2 Kit Kat I purchased for my Grandson for Christmas. I shows up in File Explorer> This PC in Windows 10 just as my phone and all my Tablets do! Yes, I can Access Photos, Files, etc... from this Acer Iconia A1-820FHD Tablet using my Windows 10 Laptop while hooked up with a USB.

Bigger question is are you looking for backups or to transfer the files around? If you want backups, how privacy conscious are you? If you don't care about sharing your videos, there are literally dozens of cloud services that can store or back up your videos, some for free, some for a fee. Many of the backup services can also back up any files on your computer, and make them available to pretty much any other computing device, OS etc... If you're privacy concerned, make sure you have multiple local copies of any files you want to back up. Flash drives are great for transfers, i.e. temporary storage while moving files around. They're not great for archival, they do tend to fail with no warning at all. So either have 3 or more copies on different flash drives, or use a different backup method. There are lots available, again at all different price points. In any case, you want multiple copies. Here's where DVD-Rs are useful - they are write once, so they can't be accidentally erased, they now are very cheap, so you could have 20 or more for the price of a 4GB flash drive, and if stored in a cool dark place, usually last at least a couple years. There are more expensive archival ones that claim to last 70 years, though I'd probably still check every few years if I really cared about the data, if only to migrate to current formats if necessary.