If you want to upload multiple orders and not input them one by one, there is an easy and efficient way to do it; to upload a CSV file. You can watch a 2 min video to see how you do it easily : (please click on link)
https://www.loom.com/share/44ff2fa01ab7476bab870e7e9594784c
Follow the same steps to download orders, the only change is click on the 'Download' icon on the orders page :)
Thank you!