Backup your data regularly (e.g. everyday after writing some notes).
All data are saved in the Modules path which is in the SD Card by default. Just copy the mydata (contains settings, bookmarks and highlights), notes and journals folder to your backup device (Cloud storage or desktop/laptop via USB cable). Or you can just backup the entire mysword folder to include the other modules as well.
If you want to use Dropbox as a
backup service and also wanted to synchronize two or more devices,
check this article from the MySword website:
The contents of the Top buttons bar of Bible, Commentary, Dictionary, Notes
and Journal/Book Views as well as the common Bottom buttons bar are
scrollable/slidable (to the left of right). Please check the other
buttons.
Configuring MySword for Optimal Use
You can change the text size by going to Menu->Preferences,
tap the Text size under Look and Feel, then
select the preferred size.
To improve the battery life, you can adjust the screen setting of your device
depending on the type of display you have:
OLED (like AMOLED) - you can use a black background with white or
light gray text. Go to Menu->Preferences, tap Color
Theme, then select the preferred theme.
LCD - you can adjust the brightness of the back light down to
reduce power consumption.
You can rearrange the buttons at the Bottom bar and at the top for the Bible,
Commentary, Dictionary and Journal/Book Views. Go to Menu->Preferences,
scroll down at the bottom and select the desired view buttons you want to
rearrange.