Which retail number is more recent

Ill probably get no answer again (stupid community)

Which retail version is more recent.


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

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.