Byte is the 8x bigger one – longer word – capital B (but the word, unless shortened, is “byte”, not “Byte”), bit is the 8x smaller one – shorter word – lowercase b.
There is a roughly 0.8% difference per order of magnitude between 1024-based binary prefixes (ki=kibi, Mi=mebi, Gi=gibi, often incorrectly written as k, M, G) and 1000-based metric prefixes (k=kilo, M=mega, G=giga) but these ballpark numbers are not affected.
Anyway, do you think it’s worth trying in terms of security against threats and law enforcement, or should I use a VPN on top?