Which file types will not upload and open in Microsoft's SkyDrive?
I don't think there any restriction of the type of files you can upload but you can only edit or create Office files in the browser.
Each file is limited to 50 MB in size, or it will not upload. Check your file size...
They will accept any type of file. On my SkyDrive account I have MP4 files, ZIPs, RARs, Tar.gz's and all kind of archive, but it's for upload, for editing, just Office files and plain text. But the files needs to be -50MB in size.
PS: I've stored all my podcast media there and I had no problem