Well... Accidentally ordered two SSD's. Return?

just title states, accidentally ordered 2 ssds 15'' macbook pro; both crucial m4, 1 256gb , other 128gb. since apps , os going going on ssd (256gb 1 deff. keepingg) , media going on hdd 7200rpm, see kind of speed difference putting media on ssd opposed hdd see putting os , apps on one? if not them guess ill have return it.

also, ive read somewhere manufactures advertise gb 1,000,000mb os thinks 1,024,000mb 1gb. way make 1mill mb 1 gb in os? thanks.

 

pm'ing return address other ssd. don't worry looks residential address in florida ...

 

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