Apple Watch Has 8GB of Storage, Limited to 2GB for Music and 75MB for Photos
Apple confirmed that all three editions of the Apple Watch will ship with 8GB of internal storage, according to 9to5Mac. Apple Watch users will be limited to up to 2GB of songs and up to 75MB of photos that are locally stored on the device and can be listened to or viewed without a paired iPhone. Songs can be synced using the Apple Watch companion app on compatible iPhones running iOS 8.2 or later.
2GB of music works out to anywhere from 200 to 500 songs depending on the audio quality, while the report claims that 75MB of photos will equal to over 100 photos that are automatically compressed for reduced file size on the Apple Watch. A portion of the remaining storage capacity is likely allocated to the Apple Watch's operating system, and will store application binaries and resources when a native SDK is released.