I noticed that this is a very common thing among a lot of storage products across technology (with maybe the exception of USBs). This particular external is only showing me 4.54 TB available, yet nothing is on it (shown anyway). I tried looking for answers all over but nothing is clear on what I can do about it.
All together WD owes me about 20tb, The 10tb shows 9.72, ABout 280 off, The 4tb shows 3.72,again about 280 off, The 6 shows 5.72… Just saying…
It’s normal.
Advertised Capacity is Base 10 mathematics … to keep it simple for Joe Public
Computers and Operating Systems use Base 2 mathematics
Therefore
5TB = 4.5475TB
Advertised to Actual Capacity Calculator : USB Hard Disk Real Capacity Calculator -- EndMemo
More info explaining https://www.howtogeek.com/123268/windows-hard-drive-wrong-capacity/
Advertising and Manufactures use Base 10 to keep it simple for Joe Public
Youre “missing” 20TB does not exist in Base 2 maths that computers and operating system use.
Anything you buy computer related will never have the capacity as advertised due to math, system files, reserved for os etc.
I learnt this a long time ago when i bought a Commodore 64 computer back in the 80’s
Yes, it had 64K of memory … but there was only 38K available for BASIC programming.
Your preaching to the deaf, WD does not owe me anything. I was being in theory…
Used in describing what is supposed to happen or be possible, usually with the implication that it does not in fact happen…
okey-dokey 
