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Destination media
DVD
USB stick or SD card
- Read-only: DVDs are read-only so your Tails can't be altered by a virus or an attacker. DVD-RW are not read-only.
- No upgrade: DVDs are cheap but you will need to burn a new DVD each time you update your version of Tails.
- Encrypted persistence: you can store your personal files and some of the configuration in the space left on the USB stick.
- Automatic upgrade: USB sticks and SD cards can be upgraded to future versions of Tails.
- Malware: an attacker with physical access to your device or through a virus could alter your Tails. Some USB sticks, SD cards, or SD card adapters have a read-only switch that can prevent your Tails from being altered, but be aware that this protection is most probably not ensured by the device itself: do not rely on untrusted computers to respect this feature.
SD cards follow the same process as USB sticks.