The iPhone 4S can shoot HD videos.
Files held by an iPhone include still images, videos and songs. The largest files on an iPhone are videos, both those captured by the user and downloaded as a purchase. While you cannot edit the size of a photo or song on the iPhone, you can trim down videos that are too large, as long as you captured the video using the iPhone camera. Videos purchased in the iTunes Store cannot be edited.
Photos taken with the camera on your iPhone are saved to the device at a size of approximately 1MB. While you cannot edit the size of photos while they are in your camera roll, when you email a photo you have the opportunity to make it smaller. After you hit the “Email Photo” button, fill out the recipient’s email address and hit “Send,” choose the size to which you want to convert the image. The iPhone offers three conversion sizes: small, medium and large, and tells you the exact size in KB of each option.
The size of each video file on the iPhone varies, as it is dependent on the length of the footage. A video 30 seconds long is approximately 3100K. Only videos 54 seconds or less can be sent out from the iPhone via email. Videos that are too long can be trimmed using the default editing program, included within the video camera. Alternatively, some third-party applications will let you send longer videos over email.
Music files are varying sizes, depending on the length of the song and whether or not the file is compressed. Compressed file types like AAC or MP3 occupy less space on the iPhone. While you cannot check the size of a song file from the iPhone, you can go to the file in iTunes on your computer, right-click and choose “Get Info” to see the file size. Size information is located on the “Summary” tab of the “Get Info” window.
IPhones are sold with 16GB, 32GB or 64GB of capacity. You can add as many files to your device as the available space will allow. Memory space can be divided up between file types in any way — there is no maximum memory available for certain types of files, such as music or video. Once your memory is full, you will receive an error message when trying to save new data to the iPhone.