http://wmpoweruser.com/windows-phone-8-1-build-14203-will-now-a
Install updates when you want by scheduling them for a time that works best
for you. And if your phone supports SD cards, it will now detect if you’re
running low on space when updating and use the SD card. (Scheduling an
update is available after updating to build 8.10.14203.206. Support for
using your SD card for updating your phone depends on your phone model and
manufacturer.)
