Successfully attached and formatted. 1861GB available. This is fine until I did the quick math and realized that this is 139GB JUST FOR FORMATTING!
Allow me to learn you on the deception that is hard drive capacity:
1KB= 2^10 = 1,024 butes
1MB = 2^20 = 1,048,576 bytes
1GB = 2^30 = 1,073,741,824 bytes
1TB = 2^40 = 1,099,511,627,776 bytes
HOWEVER, in hard drive terms, 1TB = 1,000,000,000,000 bytes which is approximately 9.95% less that what the rest of the planet knows 1TB to be. The larger the capacity, the worse the deception. Look at the bottom of the data sheet for just about any hard drive and you'll see this explained in the fine print mumblings.
On top of that steaming pile is the file system overhead.
In the era of floppy controller tape drives, the tape drive manufacturers used to fabricate bigger lies by claiming double the actual capacity because, it was rationalized, that computer data was, on average, compressible to 50% of its original size. Never mind that most of what got archived was already compressed.