eSATA is faster than FireWire and firewire is faster than USB.
You kind of answered yourself. 5 gbps is the absolute max
esata-fire wire-usb
Yes, the Western Digital 1TB My Book Essential Edition has eSATA capabilities, making it a great option for high speed transfers.
eSATA is the fastest of the three.
Look for the eSATA logo next to it. The eSATA logo looks exactly the same as the SATA logo, except that it has the lower case "e" before it.
Firewire 800 (IEEE 1394b) has a maximum speed of 800Mbps (Megabits per second). eSATA has a maximum speed of 3.0 Gbps (gigabit per second). So eSATA is faster. In very few scenarios [like transfering a bunch of small files], FireWire will come close, but in most scenarios eSATA will spank it hard. eSATA runs at the same speed as an internal hard drive connection, because it's the exact same thing. It just doesn't have the little L notch. Also keep in mind, some USB and FireWire speed will be lost while being converted from SATA to a signal that they can work with. The signal has to be processed for FireWire and USB to be able to use it. But FireWire 800 is faster than USB 2.0. And it's better for capturing video from cameras. USB 2.0 does a big burst then it slows down, while FireWire maintains a more constant throughput. I don't know of any video cameras that use eSATA. eSATA has been the best thing for external hard drives, until they came out with USB 3.0. It seems to be making eSATA obsolete. I still use eSATA because it's what I have, and it's about 3 times faster than USB 2.0. Also USB 3.0 is good for everything but, e SATA is still best for external hard drives, while FireWire is considered best for video.
Short answer: No. They are different and not compatible. Long answer: If the USB 2.0 device happens to be a hard drive that also has an esata port, then you could use the esata port instead.
eSATA is up to six times faster than USB or FireWire
An Esata port is a port you connect a ESata-compatible storage device (HDD/SSD) to. ESata stands for "External Serial ATA", and as opposed to normal SATA, this port can be found on the outside of the computer so you can easily connect Hard drives to your system. The 2 connectors can't be exchanged.
express Sata basically you can make your internal hard drive external using your esata port the cables are basically the same so all you need is an enclosure that has an esata port, esata is for fast data transfer your can reach speeds over 90mbp/s transferring data.
The companies found which product computers with an esata port are as follows: Hewlett Packard, Toshiba and LG. Esata ports could also be purchased as an external hard drive.