While flagship Lumias (like the 1520 or 930) with 1GB or 2GB of RAM received a relatively smooth—though still buggy—upgrade, the 630 was treated as a second-class citizen. Microsoft eventually pushed a build of Windows 10 Mobile to 512MB devices, but it was a stripped-down, agonizing experience.
Keep the phone offline. Use it as a glorious offline music player (the DAC in that thing is surprisingly warm) or a dedicated HERE Maps device. The "Windows 10 update download" for the Lumia 630 is a historical artifact—something you attempt once, swear at for an evening, and then lovingly flash back to 8.1 before putting the phone back in a drawer where it belongs. nokia lumia 630 windows 10 update download
If you are chasing this update download today for nostalgia, stop. You aren't looking for functionality; you are looking for a ghost. The Lumia 630 runs Windows 10 with the desperate energy of a hamster on a wheel. The camera app takes six seconds to open. The keyboard lags. Edge browser crashes on modern HTTPS certificates. While flagship Lumias (like the 1520 or 930)
Windows 10 was not.
Some updates aren't upgrades. The Lumia 630 taught us that the hard way. Use it as a glorious offline music player
You need the —a legacy desktop app Microsoft built for store kiosks. Even then, the tool often returns error code 0x80072ee7 because the update servers are now vaporware.