iTunes Match
I have close to 50,000 songs on my iTunes account. Will iTunes Match upload all of them into the cloud?
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iTunes Match is limited to 100,000 matches or uploads. This count excludes purchases from the iTunes Store. See Identify cloud status icons in your music library on your Mac or PC - Apple Support for reasons why some tracks might be excluded, e.g. too long, too low a bit rate, etc.
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