You can get either a USB flash drive or a external hard disk drive to transfer any file/folder from one PC to another.
To move the file/folder, you simply need to drag the file/folder from one place to another. E.g. from Downloads to the USB drive.
If the files/folders are no larger than 20-25MB, then it might be a good idea to attach them to an email & send them to yourself. Just open your preferred email client & start a new email. Then, you can attach the file to that email & send it.
Use cloud storage:
The best way I can recommend is to use a cloud storage system like OneDrive.
You can sign into the computer where your files are located, sign into your OneDrive & then move all the files/folders that you want to transfer to your OneDrive. Then, on the other computer, sign into your OneDrive again & you will have all the files that you moved into your OneDrive.