What to do before hard reset HP DeskJet Ink Advantage 3775?

What to do before an HP DeskJet Ink Advantage 3775 hard reset?

First of all, back up all the files you wish not to lose (do it using your computer or an SD card). Backing up applications on HP DeskJet Ink Advantage 3775 is not advisable as they might be the reason your device is malfunctioning. After the hard reset, install them one by one monitoring the reactions of your HP DeskJet Ink Advantage 3775.
After having saved all personal data, delete them in order to prevent the accidental formatting while performing the hard reset operation.

https://www.hardreset.info/