

Yes. GMT is UTC (meaning GMT is +0 and synchronized with UTC), therefore if you have to work out what time it is in other time zones, you use UTC. Your application shows the time in your time zone (unless otherwise specified). Responses will also be shown in your time zone.
I think I pay ~$12-$13USD for 3TB of storage with BB2. It’s been great. Nightly incremental backups with TrueNAS. Haven’t had the need yet to pull down the data (which I should, you should test your backups with a restore on occasion), but I have peace of mind knowing it’s there and encrypted.