Which retail number is more recent

Ill probably get no answer again (stupid community)

Which retail version is more recent.

WDBMMA0060HNC-ERSN or ‎WDBAVV0060HNC-WRSN

En which disk is inside. EFrX or EFZX and the cache?

@Ezio
Have you ever tried a Google search or whatever search engine you prefer.

Hard Drives, USB Drives, and Memory Cards | Western Digital

WD External Hard Drive and Internal Hard Drives | Western Digital

Saying this community is stupid, lucky if anyone wants to answer you.

All my computers, storage drives, printer, etc. work. I subscribe to three computer magazines, read and study College text books and have a good enough education to know where to look for information!

Go seethe you stupid woke faggots.