> how do I know my 3rd party B2 backup system isn't going to cause me extra charges from using API's inefficiently? Uploads are completely free. I think what

> how do I know my 3rd party B2 backup system isn't going to cause me extra charges from using API's inefficiently? Uploads are completely free. I think what you will find is the bulk of your charges will simply be "storage" (at half a penny per GByte per month), the API charges aren't intended to nickle and dime you. We are simply trying to discourage abuse of our API servers. Creating a Backblaze B2 account is totally free, and if you stay under 10 GBytes it is totally free (and we will cap you to that until you give us a credit card). Seriously, try it out! There is a handy "Reports" page after you log in (look for the word "Reports" along the left. It will tell you EXACTLY what API calls have occurred and how many times. If you need more than 10 GBytes and are still worried about cost, as part of your experiment look for "Caps & Alerts" along the left after you sign into your B2 account. You can setup daily "Caps" (like for $1/day) so that you absolutely won't exceed your budget until you are comfortable with the B2 service!