First of all, Raspeberry 3b is an hard to find piece of hardware, bacame costly too of late.
Anyway, users experience is the same using a Raspberry 4.
To install the thing, read the fine manual or have a look to the many youtubers who explains the simple procedure.
When u have your ssd with Kali 4+ inside, then is time to use it.
First thing of all, Kali images arrives in this kind of situation:
df –block-size G
Filesystem 1G-blocks Used Available Use% Mounted on
/dev/root 10G 10G 0G 100% /
devtmpfs 1G 0G 1G 0% /dev
tmpfs 1G 0G 1G 0% /dev/shm
tmpfs 1G 1G 1G 1% /run
tmpfs 1G 1G 1G 1% /run/lock
/dev/mmcblk0p1 1G 1G 1G 59% /boot
tmpfs 1G 1G 1G 1% /run/user/133
tmpfs 1G 1G 1G 1% /run/user/1001
That’s wierd, because /etc /usr /home, etc are located in the “/” filesystem, mounted in a partition completely full. U can forget to easly upgrade, so U have to extend the partition, or create a new one and change default mount of the useful dirs.
I’ll try to extend the ‘/’ partition.