This hard drive from LaCie has room for 5,000 GB of data. People tend to have very specific needs when buying computer compontents, but this could potentially work well for you.
From Amazon
LaCie Mobile Drive, 5TB, External Hard Drive, Space Grey, USB-C, 2 year Rescue Services (STHG5000402)
The product is available from £129.99 at international stores.
This product is also available at 1 unverified merchant.