Secondary Memory Units and Systems Including the Same

A secondary memory unit comprising:

• a first substrate on which one or more non-volatile memory units are mounted;
• and
• a first case in which the first substrate is accommodated,
• wherein the first case comprises a first terminal configured to supply normal power to the first substrate and a second terminal configured to supply a backup operating power to the first substrate when the normal power is cut off.

A secondary memory unit, comprising:

• a first case that includes a first substrate that has a non-volatile memory unit mounted thereon;
• a second case that has a second substrate that has an energy storage and supply medium mounted thereon;
• and
• an energy transfer medium that electrically connects the first substrate to the second substrate and that is configured to selectively supply energy from the energy storage and supply medium to the non-volatile memory unit.