My cloud states "there isn't enough room on your mobile device"

I am trying to upload my pictures and videos from my iphone 4s to my 2tb My Cloud but my iphone states “there isnt enough room on your mobile device. Please clear some space and try again” why does my phone need more space when i am actually trying to upload the pictures from my phone to my My Cloud? Can someone please help. 

miah9303 wrote:

I am trying to upload my pictures and videos from my iphone 4s to my 2tb My Cloud but my iphone states “there isnt enough room on your mobile device. Please clear some space and try again” why does my phone need more space when i am actually trying to upload the pictures from my phone to my My Cloud? Can someone please help. 

It first copies the images to its own memory space before it uploads them.