Not enough Cloud space to export RB1 songs for RB4, what now?

I've read 10 different explanations on how to get my Rock Band 1 songs from my Xbox 360 to Rock Band 4 on my Xbox One, but they all seem to be missing some really important step that I don't understand.
On RB1, I can export my songs (I did so awhile back to get them into RB2) to local disk, but I'm not sure how that helps me get them to my Xbox One. I've tried exporting them to Cloud Saved Games, but my RB1 export is 1.52GB and I've only got 0.5 GB of Cloud space.
What am I missing?
Best Answer
It looks like the RB1 disc songs aren't exportable yet, but Harmonix says they are working on that for early next year (2016).
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Can you still export Rock Band songs?
Head to 'Exports' and click the Rock Band 3 listing. In Rock Band 4, press 'Get More Songs', then 'Store Home'. Head to 'Exports' and click the Rock Band 3 listing. 5/83 songs on this release are featured as standard DLC.How to export Rock Band songs?
Get the manual from RB2 and sign into Xbox Live. Start up Rock Band 3 and head to the "Get More Songs". Once you got it, go to Redeem Code and type it in. Choose \u201cRock Band 2 Export Pack\u201d on the next screen and confirm your purchase (800 MSFT Points).[CUBASE 3, 4, 5 \u0026 9] HOW TO FIX \
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