Temporary storage while migrating

[TenForceFalls]

Hi all, I have about 7tb worth of stuff backed up to my NAS. I originally "stole it" (my boss didn't want it anymore or to pay for e-waste) form my work and have been using the hard drives that came with it. I plan on getting brand new hard drives once I decide where I'm going to temporarily place my data. I am lucky to live in a area with gig fiber and I would like to backup to back blaze b2. My current config relay Before I pull the trigger and waste time / money I want to make sure of a few things. 

1. I can find a more permanent off site backup (like b2)

2. Whatever temporary place I decide to store everything has a calculatable fee for upload and download

3. Can be transferred with something built in to truenas or with windows accessing the share I have set up

 

If there is a better way to go about doing this please let me know!