Need to transfer stuff from laptop to secondary PC

Ok so I am fairly new to YouTube and I make content fairly a lot but. It takes 1 hour to record the gameplay, about 4 hours to edit + render (The editing takes along time) and then for some stupid reason due to internet connection it takes about 24 hours to upload a video to YouTube (I make videos about 8 mins long, if not I put them into different parts). So it takes to about 2PM to edit it and I upload it to YouTube it takes 24 Hours. When I go to sleep it really annoys me when I try and sleep and I could use my laptop to record even more videos the next day. So I thought of purchasing a really old computer (I still would run the latest version of Windows) that I would connect via Ethernet and upload it via a secondary machine. So my only problem is now how do I transfer a file about 7Gb from my laptop directly to a HDD (Not C:/) to a secondary PC?

---Laptop Specs---
8GB DDR3 Ram
AMD A10 (I am not to sure of the model number)
1Tb HardDrive (With a Recovery and 50GB Partition)
DTS Sound+ (No idea why I needed to include this)
And A very un-reliable Wi-Fi card that picks up internet at 60Mbps Down/Up but seems to only receives 1Mbps when downloading and 0.2Mbps when uploading

---Secondary PC Specs--- (The main purpose of this is to just upload videos to YouTube)
4Gb DDR2 Ram
Intel Xeon (Again I am not sure of the model number)
80Gb HardDrive (I will eep the Windows files on there but my upgrade to an SSD
160Gb x 3 HardDrives (I have so many of them)
Intel Gigabit PRO 1000Ct PCIe Network Card
The same internet

Now I did I speed test from KC Communications to 6a Hosting Service in Shefield and I got Aprox 6.3Mpbs with a 33ms ping.

Just connect them both to the same network, and just drag and drop from the desktop to the laptop. Simple Networking 101 stuff. It really does not matter about your Internet speeds. It is all about the network speed. In this case do it through Wired Networking, unless you can get your wifi network to run at full speed.