For anyone interested, here I'd like to share the real life Internet data usage of my (VE3VEE) remote station. The usage may vary based on your settings. The Audio Quality settings I use are the #2 - Linear 16 bits 8 kHz in both, my Radio-RRC and also my Control-RRC.
This past weekend, I participated in the CQ WW DX Contest (PHONE). My TCVR was turned on the entire 48 period. The screen shot above shows my one day data usage. In 24 hours my station used 1.5 GB of upload + 1.5 GB of download = 3 GB of data in total. The entire 48 hour contest used up 6 GB of data. This is however an extreme situation when my TCVR was on constantly 48 hours non-stop. My regular usage is much less. I may share, in the future, my actual data usage for a one week period and for a one month period.
Marvin VE3VEE