If you have more than one Hard Disk Drive, carefully select the hard disk you wish to modify to make a partition for Mepis.
sda is the mass storage device connected to the systems first SATA controller
sdb is the mass storage device connected to the systems second SATA controller
sdc is the mass storage device connected to the systems third SATA controller
If you choose the Auto Install using entire disk, everything on your hard disk will be erased, so use with caution.
NOTE USB Flash drives are represented exactly the same as a hard disk drive, however, Linux classifies them after all hard disks have been accounted for, so if you have one hard disk and you booted your system with a Live-USB version of SimplyMEPIS, the hard disk will be located at sda and the thumb drive will most likely be located at sdb