How Do Backup Prior To Factory Reset?

[TomBrooklyn]

How do I back up my phone prior to doing a factory reset?

What, if anthing, can't be backed up?

What other procedures would you recommend prior to doing a factory reset?

My phone is so screwy I suspect only a factory reset will straighten it out.

 

[ironass]

How do I back up my phone prior to doing a factory reset?

What, if anthing, can't be backed up?

What other procedures would you recommend prior to doing a factory reset?

My phone is so screwy I suspect only a factory reset will straighten it out.

For details of how to backup, see... Backup! Backup! Backup! NOW!

For details of how to do a Factory Data Reset, see #2.3, #2.4 and #2.5 of S5 Lollipop Update Problems - Dummies Guide