You will need to perform a backup before upgrading your iPhone with the latest update later this month. Apple iOS 10.3 promises to deliver a variety of new updates however one component of this update has the potential to devastate users if data and files are not backed up.
The main factor causing this is the introduction of a new file system replacing its 29-year-old predecessor known as HFS+. Upon performing this update your phone will automatically convert to the new filing system but if something were to go wrong you may see your old files disappear.
Although this might sound risky the new filing system will be a huge improvement on the old version allowing for stronger encryption, accurate time stamps and optimization for solid state storage.
Please see full article for instructions on how to perform a backup of your data. Click the link below.