If you downloaded some books and can’t open them, it’s usually a problem with the file type or the app you’re using. A lot of study materials come as PDFs, ZIP files, or even just images, and each one needs a specific app to open. So, take a look at what kind of file you have. If it’s a PDF, grab any standard PDF reader for your phone or computer. For ZIP files, you’ll need to extract them first before you can see what’s inside.

Sometimes, the download didn’t finish or your device just ran out of space — both can mess things up. Try clearing a bit of storage and downloading the book again. If you’re on your phone, a quick restart can help, too. And if nothing works, see if you can open the file on a different device. Most of the time, once you’ve got the right app and a complete file, you’re good to go.