Is this some Apple, Windows PC, or Linux tablet?
You should also format the card in the camera when it's new so you don't repeat what others have discovered later.
So I uploaded two video files to my computer and a screen usually pops up with the files but nothing happened so I checked my SD card but it didn't have anything on it so I went through and searched my documents, pictures, downloads, and favorites. I found nothing there so since I marked "automatic delete when uploaded" I used testdisk to restore them it worked but I don't know where to find them. What folder would I find restored files in? Also where did my videos go if they're not on my card where are they on my computer. Like what folder? Please help I need these videos.