I have a spare 4GB SD card now and want to put some tools on it. Only have GParted now. I'm looking for system rescue tools as well as exploitation/cracking/whateveryoucallthem tools. I'll be using YUMI for this. Now while YUMI have a list of distros, I can't really research every one of them to decide. Space is rather limited so I can't put too much. If you've made a multiboot USB before I'd appreciate it if you can give me some advices.