There is not annough space on this location

hi,

i did made a incremental backup of my 1 TB c drive incremental usb

backu did fine a lot of 4.*** gb files

now did i place the backup harddisk onto the network (usb-> router)

i did remove al the backupjobs and made a new one also incremental on the same directory etc.

i do now get the message there is not annough space on this location

 

what am i doing wrong?

 

greetz