SSD has a faster rate but are smaller drives and much more expensive than traditional HDD.
You said "faster transfer through the lan" would involve you buying at least a 100mbit (Fast) or 1000mbit (Gigabit) switch to ensure the transfer across the network is up to spec. But then it's upto the PC's bus to handle the balance of the transaction. If its an older motherboard, you won't get much more speed out of it until you upgrade the motherboard.
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Jen
Gaming Rig: Intel i7-3770K Ivy Bridge, 16GB DDR3 RAM, 120G Intel 330SSD, Asus GTX760 and Asus P8Z-77V-Pro
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