I lost my flashdrive few months ago and all my accounts and passwords stored in it got hacked. I have like almost hundred of accounts like gmail, microsoft, aws, ebay, paypal, vultr, digital ocean with different strong passwords that I couldn't remember.
I have recovered most of my accounts and I want to prevent similar event in the future, so I'd like to know how to prevent anyone that is not me from viewing files inside portable flashdrive/harddrive?