Have you been waiting quite a while for your Snak™ media to upload?
This may be due to a variety of reasons, for example, the:
upload bandwidth,
number of files selected,
file size,
file format, and
performance of your internet connectivity,
etc.
Tip: If possible, try to reduce the media file size as far as possible before uploading these to your Snak™ as this will reduce the upload time considerably.