There are some SD-cards with Wifi Modules in them around (Toshiba FlashAir for example). Pop one of those in a USB adapter and you're done. Similar solutions a

There are some SD-cards with Wifi Modules in them around (Toshiba FlashAir for example). Pop one of those in a USB adapter and you're done. Similar solutions are also popular in the 3D printing space, look up Fysetc or BTT wifi sd cards.