right but somehow using two makes it untraceable? If i'm just browsing through darkwebmarkets and using secure wallets should installing it using 1 usb drive be enough?
when you write the tails iso to a disk it uses the entire disk. so you need a second one for persistent storage. persistent storage could also be on your hard drive. it's encrypted so placing on your HDD is not a problem.
no it doesn't. Tails is like any other linux distribution as far as i know with the difference that it -by default- doesn't store anything and wipes out everything after you sign off.
and the persistence is what you can enable to store the data you need later. and it can be stored in that same 1 USB, it will create a new file with the specified size (it is called casper-rw) and stores everything there.
as i said above the second USB is only used as a medium to boot up the ISO and install it. if you are already on a Linux OS you don't even need that, you can install on that USB inside your OS.