I came across this deal while hunting for SSD, looks like this 2TB has a good write speed of 2000MB/s.
Officeworks has them for $660.
4TB @ 33% off for US$599.99 (~A$890) - https://www.amazon.com/SanDisk-4TB-Extreme-Portable-SDSSDE81…
2TB @ 50% off for US$254.99 (~A$377) - https://www.amazon.com/SanDisk-2TB-Extreme-Portable-SDSSDE81…
1TB @ 35% off for US$199.99 (~A$296) - https://www.amazon.com/SanDisk-1TB-Extreme-Portable-SDSSDE81…
Add delivery, GST & foreign exchange fees.
Hope it helps the OzB community.
Here's another option: https://www.ozbargain.com.au/node/713026