where can I download and store 1.5 TB of data from TCGA while I am processing the files through Galaxy? I have very limited memory on the hard drive on my PC.
Do you have to process them all at once?
I don't know of any place that will let you store 1.5Tb of your own private data without making it publicly accessible.
Try to ask here: https://biostar.usegalaxy.org/