In most part of Africa hardware wallets are not only difficult but expensive to get apart form using custodian wallets like trust wallet and metamask is there an alternative software that can help hodl Bitcoin in a flash drive. or otherwise
Everything has a purpose and a particular functions that they were created for, flash drives were never created to store bitcoins, so it not something possible for it to do. The purpose and idea behind the creation of flash drives was conceived without any knowledge of something called cryptocurrency or bitcoins in particular. Flash drives have their history as far back as year 2000 so you can understand why bitcoin storage was not considered as a function for them.