There have been a few comments and questions regarding problems with the backup. We are aware of the problem but we have no good solution in sight. Here is an explanation from our dev team:
Unfortunately there is a bug in the Android OS that is caused by certain SD-cards. Android mistakenly assumes that the database is corrupt. Older versions of Android responds to this by crashing, while never versions instead deletes all data and gives the app an empty database. Currently there are no efficient way to import the notes into MobisleNotes. However it is still possible to recover the notes to your computer if they are important. Also we are currently working on a workaround to this problem, and with the next release this issue will be solved.
One way to retrieve your notes is if you connect your phone to your computer you can mount the sd-card, so it can be accessed from the computer. Your backups are in the folder “MobisleNotes”. If you want you can mail the database to us, and we will extract them for you and send them back. This would be done automatically and no one would read your notes.
To manually extract your notes you will need a database-manager. If you are using firefox as your browser, one of the simplest way is to use an add-on called “SQLite Manager”. This program will be able to open the database-file. After you have installed the add-on, in firefox click “Tools” and choose “SQLite Manager”. First open the database. Your notes can be extracted like this: In the menu to the left, select the backup file. Click “Tables”, then “notes” and choose “Export”. Here you can configure the settings of the export, but just click “ok” to export your notes as a csv-file. Some redundant data will also be in the file, but your notes should be fully readable.
Update 120117: There is no solution in sight for this problem and as we are introducing a free web-sync in the upcoming version we are phasing out the automatic backup within a few versions. Anyone that have experienced this problem will be rewarded with 1 year premium subscription of the new service. More on this when we have launched the new version.
Update 111201: This bug only occurs on HTC phones and we have ongoing support from HTC to solve it. If you experiencing this issue on an other manufacturer, please let us know.