When I went to Japan I knew I'd have a lot of images so I took my wifes cheap notebook.
An Acer Aspire V5-122 11.6" touchscreen but 500Gb harddrive and built in SD card reader.
Ok for storage and viewing but rather slow if I wanted to play with some images in the evenings.
I also took a 320GB portable USB hard drive which I had lying around.
Every evening I copied the days images to the notebook and then backed up to the USB drive. I kept the full cards aside as well but was well prepared with 8 x 32GB cards. 11000 images taken and safely shipped home
Kept the notebook in my case and the USB drive in my camera bag.
Worked fine if a little slowly.
Only a Tamron 16-300 left sadly. Sony cannot supply what I want so rightly or wrongly I've branched out to someone who does and I'm very happy.