So I advise you to check the settings and miner's configuration, try to look the other way to move another
data in another location.
It's not "maybe" since FutureBit devices is intended for both mining and running full node. And OS provided by the company already include software to do both.
automatically be removed, like system logs, and those files that are no longer needed. But of course, this could
only be done using the command "Sudo apt-get autoremove".
sudo apt-get autoremove only remove unused package (such as older linux kernel), it doesn't remove other unnecessary file. And obviously apt-get isn't the only tool you could use to do that.