" I connect my tablet to my laptop and "
Blammo. Windows Explore will make thumbnails. These are usually hidden but as you connected and looked around, well, I'm unsure if you know Windows that well to know that it does this to speed up browsing. If it didn't, folk would lambast Windows for it's lack of speed even more.
Said things may be hidden from the default settings.
I have an ASUS tablet with Android 4.2.2 and a 32Gb micro SD card. The internal storage is 4 Gb.
I have created a folder on the microSd to place pics in to be seen on the tablet. But, whenever I open "Gallery" or "Photos" on the tablet, I get a screen with two thumbnails of each pic. When I then open the pics to look at them individually, I seem to have two of each. In the folder on the micro SD there is only one file. I have looked thru settings, I have deleted all pics and made a new folder, all with the same result. Who recognizes this and knows how to get rid of this problem?
Thnx for helping!