Today I connected my Amazon Kindle via a USB port. When I wanted to disconnect my kindle, I didn't see any option to remove USB device from the PC.
I am searching for the 'safe remove hardware' functionality in like in Windows. I'm afraid I'll make things crash and loose all my data if I just disconnect the USB cable by hand.
How can I remove USB devices safely from my PC in Ubuntu 14.04 LTS?
Ubuntu's default file manager, Nautilus, shows an eject button on removable devices.
Below you see a screenshot section of Nemo's sidebar when I have my Sony E-reader plugged in. Note the eject button right next to "READER".
You can also eject a drive by right-clicking on its icon in the launcher, and click "Eject", as in the image below. E-readers have a Flash Drive icon most of the time.
Your system give me cause for concern. Ubuntu does not act like Windoze and mount everything in sight. Unless you made a script for this, Ubuntu will recongize it but will not force mount. As for saftly removing just right click on your taskbar and eject device you can also do this open your Files and clicking the eject button next your kindles name under devices.