Ubuntu uses at least three different icons for identifying USB storages. What are the criteria used to diferentiate those?
For instance, I have two nearly identical Sandisk Cruzer Blade USB drives, one 4 GB and other 8 GB. (The output of
lsusb is the same for both:
Bus 001 Device 009: ID 0781:5567 SanDisk Corp. Cruzer Blade). On Linux, one is displayed with the flash drive icon and other with the generic USB storage icon. Sometimes a third, purple icon is used too.
What is the cause of this behavior? Are there other icons? What are the rules for Ubuntu picking different USB drive icons and what do they mean?