However there is one glaring issue:

In the passage:

SATA II is capable of running at 3.0 Gb/s which stands for 3 Gbits per second and NOT 3 GB (Gigabytes) per second. It can get a bit confusing so lets suffice to say that SATA II is theoretically capable of a maximum speed of 300MB/s but, in reality, 285 MB/s seems to be the maximum as a result of hardware and sofware limitations.

It’s not a result of “hardware and sofware limitations”, it’s simple maths
300 Megabytes a second
300,000,000 bytes a second
is equal to:
286 Mebibytes a second
(1 Mebibyte = 1,048,576 bytes)
So the passage could be corrected by saying:

SATA II is capable of running at 3.0 Gb/s which stands for 3 Gbits per second and NOT 3 GB (Gigabytes) per second. It can get a bit confusing so lets suffice to say that SATA II is theoretically capable of a maximum speed of 375MB/s (357 MiB/s) but, in reality, 300 MB/s (286 MiB/s) is the maximum after 8b/10b encoding.

References:
SATA 3Gb/s: https://en.wikipedia.org/wiki/Sata#SATA_Revision_3.0_.28SATA_6_Gbit.2Fs.29
8/10 bit encoding: https://en.wikipedia.org/wiki/8b/10b_encoding
Mebibyte: https://en.wikipedia.org/wiki/Mebibyte