In France, Free just announced up to 5000mbs down and 700mbs up for 40€. Orange has 2000mbs down and 600mbs up for 50€, and may have better peering in general.
From https://lafibre.info/free-les-news/keynote-freebox-pop/.
What do you mean?
Now i started doing photography as a hobby, and boy, are those raw files large. 24mb each. Last weekend i was on a short trip with friends, 75 GB of raw photos and videos. Gotta back those up, the faster the better.
You can also use versionning when you sync your files.
I do file backup of my photos, documents, invoices, and other random things I've setup for backup.
Edit: add more info
So you can't have it on a single device. What it allows is to have 2 computers, each one with their own full 1 GBps link.
In practice, it is mostly useless. I have the 1 GBbs plan on the same provider (Orange) and I generally only get full speed on speed tests, and the only times I use a significant fraction of my bandwidth is on the occasional large download (ex: games).
Free, the other ISP, is known for its ludicrous speeds at the end point but from my experience a few years ago, it is seriously limited by its infrastructure. So you my get 5 Gbps on the local loop, but you will never get these speeds on the greater internet.
Basically, 1Gbps+ fiber makes your internet connection somebody else's problem. The last mile stops being the limiting factor.
Consumer grade 10Gbit ethernet and fiber NICs exist, and for fairly cheap too.