Seagate 4 TB Backup Plus USB 3.0 Portable 2.5 Inch External Hard Drive for PC and Mac with 2 Months Free Adobe Creative Cloud Photography Plan. Sold by Amazon. £84.99

Twice the storage capacity of comparably-sized portable drives
Share your files between Windows and Mac computers
Slim, metal design provides premium portability
Protect your data with easy flexible backups
Includes two month free membership to Adobe Creative Cloud Photography Plan. Must redeem by January 31, 2020
This driver provides write access for Seagate external drives in Mac OS without having to reformat.
To redeem 2 Months Free Adobe Creative Cloud Photography Plan , one needs to run the software installation on the drive.