Tails is a [[!inline pages="inc/stable_amd64_iso_size" raw="yes" sort="age"]] download and takes ½ hour to install. Tails can be installed on any USB stick of 8 GB minimum.Tails works on most computers less than 10 years old.You can start again on the other operating system after you shut down Tails.
[[!img amnesia.png link="no" class="svg" alt=""]] <i class="metaphor">Like a tent, Tails is amnesic: it always starts empty and leaves no trace when you leave.</i>
On the contrary, Tails never writes anything to the hard disk and only runs from the memory of the computer. The memory is entirely deleted when you shutdown Tails, erasing all possible traces.
[[!img persistent-storage.png link="no" class="svg" alt=""]] <i class="metaphor">Like a backpack, you can store your personal things in your Persistent Storage and use them in your tent.</i>