I think it's a decent buy at around $24.75/TB considering recent price hikes
Nothing better on Amazon.au: https://diskprices.com/?locale=au&condition=new&disk_types=e…
Should be shuckable: https://mattgadient.com/how-to-shuck-the-seagate-expansion-4…
FYI, probably SMR which is inferior to CMR.
(correction) HDD inside: should be ST4000DM004 (thanks Trance N Dance)
eBay link if you want to use gift cards: https://www.ebay.com.au/itm/Seagate-4TB-Expansion-Desktop-Ha… (thanks @cycloneaussie)
JB HiFi same price: https://www.jbhifi.com.au/products/seagate-expansion-desktop…
It's not portable…it's a desktop HD