HELP! My USB needs to be reformatted?!

So i plugged it in one day and it says it neede to be formatted. I didnt want to because i have several schoo, projects on it but i tried anyways. I cant even do that and its saying Windows cant format it and make sure its not read-only. I've tried a few answrs i found on here but they're not working. i have no switch or reset butto. :[ HELP PLEASE