Lto tape. But I only have 15tb

It quickly becomes cost effective when you actually need the data to be safe. Far easier to have off site backups. I have never had a problem , but I like to have offline backup. Most of the time my data is static. So I am only backing up projects files ans changes for the most part.

If you have 40+ tb of dynamic data I can’t help there.

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The box from my isp doesn’t support bridge mode. Maybe I am having the double nat problems?

I’ll need to check for this. I have the ISP box plugged into the wan port of the router. It shouldn’t also be handing out IP, but it very well may be.

In the USA I am stuck with the router from the isp. I have the ISP router plugged into the wan port of the cloud gateway

B&h photo and video as well as adorama let you buy ubiquiti equipment and return it.

Ubiquiti has a reputation for not accepting returns on properly functional gear