SSD is an upgraded version of HDD,diffrence between them:
1 SSD is like a memory card (but faster and stronger),HDD is like a ODD (but HDD spins fast then ODD)
2 SSD is so reliable,cause cards dosen`t wreck easily,but HDD with one time move will crash because of that discs spinning on him,some HDDs may have protection....but mostly not
3 SSD is very expensive,just 256 gb of SSD Minimum:100 $! but HDD 256 brings just
20 $
4 SSD operates securely and fast then HDD,even it has an advanced smart technology
5 SSD is thin and light (cause it is a card
6 operations of SSD are more than HDD,it is somehow like a prossecor
AT THE END IF YOU WANT SAFE,NO ERRORS