Writable Removable Media (Hard Drive, Solid State Drive, SD card, USB key, CD / DVD / Blu-ray, etc.) should automatically mount and appear on the Desktop and in the File Manager (Thunar). If the removable media is “greyed-out” it’s not mounted – yet.
You may then read, write, cut, copy, paste and backup files to and from the computer and the removable media. Any / All removable media may need to be (re-)mounted when switching user accounts and / or logging-in.
Removable media should be unmounted before physically removing it from the computer. From the Desktop, right-click the removable media’s icon and select Eject Volume or Unmount Volume from the drop-down menu
Alternatively, Eject removable media via the File Manager (Thunar) by clicking the Eject symbol
Android phones have a Linux kernel at their core which makes working with one very straight-forward. To mount an Android phone, you’ll need to right-click the phone’s icon and choose Mount Volume.
Unlock the phone (if it’s locked) and choose Allow
If an Android phone won’t connect / mount / open, some things may be missing
Open a Terminal [Ctrl]+[Alt]+[T] and type:sudo apt install bluez-obexd gvfs-backends heimdal-clients jmtpfs libudisks2-dev mtp-tools python3-dnspython python3-markdown samba-common
KDE Connect is a GUI app for Android and iPhone that offers easy two-way access and more. Browse files and folders remotely, get phone notifications and reply to texts on your computer, ring your phone from your computer, run commands on your computer from your phone, use your phone as a remote control for music playing on your computer, and more. See the KDE Connect UserBase Wiki here. Read How to connect Android on ZDNet and / or How to Connect Your iPhone on MakeUseOf.
Install KDE Connect
Open a Terminal [Ctrl]+[Alt]+[T] and type:sudo apt install kdeconnect
Some folders available on an Android phone (folders will be different depending on the apps installed)
Photos taken by an Android phone (or, most any device with a digital camera) are stored in a folder called DCIM; an acronym for Digital Camera IMages.
Select the photos (or videos) you want
Go to Edit > Copy (or Ctrl+C) to leave the photos (or videos) on the phone while copying them, or Edit –> Cut (or Ctrl+X) to delete the photos from your phone after moving them
Paste the photos (and/or videos) on your C4C Ubuntu system. There are “Pictures” and “Videos” folders there already but, it’s up to you where you’d like to put images from your phone.
Music is stored in the Music folder and may be copied, cut and pasted in and out of there however you see fit
Optical Discs The default application for working with a Writable or Re-Writable CD or DVD (+/- R/RW/DL) or Blu-ray is Xfburn, found under Multimedia in the Menu. This no-frills “burning” application is fast, stable and able to handle any burner it sees.
The Xfburn main window opens to the app’s 4 features; Burn Image, New Data Composition, Blank Disc and Audio CD. Gstreamer is needed to delete the data on a Re-Writable CD or DVD; install Ubuntu Restricted Extras to get it and use Blank Disc.
Save 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. Some applications allow you to set up automatic saves at timed intervals. In LibreOffice, you may visit the Tools > Options > Load/Save > General tab and check the check box(es) for Save AutoRecovery information every [so many minutes] and / or Always Create Backup Copy.
Backup See GUI backup apps Amanda, Back In Time, Bacula, DejaDup, Duplicati, Duplicity and Timeshift. Also see Command Line info from Ubuntu Free and BackupYourSystem on the Ubuntu Community Help Wiki.