"get: write error: No space left on device"??? (no replies)

Got a new pogo p21 (E02) trying to put archlinux on it , the device says it has 125M (using DF - h) available in "tmp" folder but when i try to doenload archlinux it stops about 70% saying "get: write error: No space left on device".

What do I need to do????

Thanks