HTC One Remix - Manual (Page 173)

Backup
Ways of backing up files, data, and settings
Worried that you might lose important stuff on HTC One remix? Back up
HTC One remix before you erase the storage, do a factory reset, or
upgrade to a new phone.
HTC Sync Manager
Use HTC Sync Manager to import music, photos, and videos from
HTC One remix to your computer. You can also sync locally stored
contacts, calendar events, bookmarks, and playlists between
HTC One remix and your computer.
Likewise, HTC Sync Manager is a good alternative if you don't want to back
up your accounts, settings, and other personal content to the cloud. You
can use it to create backups of HTC One remix on your computer.
Other backup options
If you want, you can separately back up your data or files.
Some apps allow you to back up data to the phone storage or storage
card so you can easily restore them after a factory reset. Just make sure
not to erase the phone storage or storage card when you do a factory
reset.
Sync, backup, and reset 173