Ubuntu is led by [Canonical](https://en.wikipedia.org/wiki/Canonical_\(company\)), a for-profit corporation that takes most of the important decisions.
If it were possible to use the same USB stick with another operating system, for example to store files to use on Windows, a virus in the other operating system could corrupt your Tails.
To store files in your TailsUSB stick, use the [[Persistent Storage|doc/persistent_storage]]. To exchange files between Tails and another operating system, use a separate USB stick.
Our team sometimes publishes emergency releases, whenever important security upgrades are available in Debian or *Tor Browser* before the next scheduled release.
If you worry that your Tails might be corrupted, do a [[manual upgrade|doc/upgrade]] from a trusted operating system to upgrade it to a trusted version of Tails.
[[!img doc/anonymous_internet/tor/tor.png link="no" class="svg" alt="A Tor connection goes through 3 relays with the last one establishing the actual connection to the final destination"]]