HTC One M8 for Windows - Manual (Page 194)

Preparing for a software update
To make sure a software update can be carried out smoothly and without
interruptions, prepare your phone for the update. Here's what you need to
check.
§ If your battery level is low, charge your phone before starting the
update.
§ Check how much free space you have on your phone and make
some room for the update. To find out how to check the available
storage, see Checking phone storage on page 182.
§ If necessary, remove a few unwanted apps. Refer to
Uninstalling an app on page 182 to see how it's done.
§ You can transfer files, photos, and videos to your computer or
upload them to the cloud. To learn more, see
Keeping things
in sync on page 189 and Backing up your files on page 191.
§ Or delete large files (such as photos, videos, or music) from
your phone.
§ Make sure your phone is set with the correct date and time. This
determines which new updates you'll need. For details, see
Correcting the date and time on page 195.
§ Check the current software version of your phone. Some updates
require your phone to have a particular software version. On the
Start screen, swipe to the left and tap Settings > about > more info.
The screen will show details about the phone software.
194 Update and reset