Just started backing up my audio and mappings online. Searched around and found Backblaze.
http://www.backblaze.com/
Inexpensive, unlimited storage. Price and software can't be beat. Mac and PC compatible. I got anxious about my music all being on my external and internal, what if something happens at my apartment and I lose it all at once? Dropbox is great but, more expensive and limits the amount of storage. Been using it for about 2 weeks now. Runs great. However, it doesn't store your OS or application files.
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