I bought online an OTG USB for iphone, ipad, android and on a computer. I tested it for a day when I received the package and it all went well. I even recorded a video of me opening and making a review of the product and posted it on my Youtube channel. After I made the video I set it aside because I don't really need it for the moment. 3 months later I am going to use it and find out that it is not working on large files like 1GB and above. I formatted the USB multiple times and tried to switch ports but it's not really working. The video got around 500 views and good thing no one bought from the link. On the video I only tested it transferring and storing photos and some videos with file size 300mb to 600mb only. I already turned down the video so other people won't get the same product. I cannot return the USB already because 3 months already passed from the date of purchase.