SD card is not mounted in Lubuntu [closed]

MountManager is described as "The program for mounting of storage devices, flash cards, removable disks in Linux". Even if it doesn't solve your problem completely, MountManager will make it easier for you to mount and unmount your SD card manually. MountManager is no longer available from the default Ubuntu repositories for versions of Ubuntu newer than Ubuntu 12.10 and instead you can use the Disks application which is installed by default in Ubuntu.

You can take a look at a screenshot of mountmanager by searching for it in Synaptic Package Manager and clicking on "Get Screenshot", and you can also install it from Synaptic.