USB thumb drives are ubiquitous across society these days, and their use for storing cryptocurrency keys began almost as soon as currencies were ...
source https://www.google.com/url?rct=j&sa=t&url=https://sg.finance.yahoo.com/news/op-ed-air-gap-technology-193520032.html&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNHCKf4wIianOu4nOi0HK5YSk-7NYw
