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When choosing to open the removable media with an application, or open the removable media itself (to work with the files inside), you’ll be "mounting" whatever it is. Exceptions are when you’ll be writing to a CD or DVD, or (re-)formatting a USB drive. In those cases, you’ll want to chose Cancel.
The popularity of Android phones in the last several years has made Linux the most used general purpose Operating System (OS) in the world. And connecting an Android phone with the C4C Lubuntu ReSpin is easy. Start by plugging the phone into an open USB port on the computer.
Open the Android phone in the File Manager and double-click the Phone (or, some phones may call it Internal Storage) icon.
Select photos with a click and drag of the mouse cursor, select some by holding down the [Ctrl] key and clicking only the ones you want, or select one and then press [Ctrl]+[A] to get them all.
Copy to leave the photos on the phone, or Cut to delete the photos from your phone immediately after moving them.
Paste the photos in the Pictures folder (or wherever you so choose) in your computer.
Save early, save often. Save now. Nothing is more frustrating than having several hours (or even several minutes) of work lost because you didn't save.
Systemback makes backing-up system and user configuration files easy. Make restore points to take a snapshot of your system at a particular point in time. Later you can use them to restore your “system back” to the way it was. Other GUI backup applications include Amanda, Back In Time or DejaDup.
Also see BackupYourSystem on the Ubuntu Community Help Wiki