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I have a C2600 wireless router. I have connected a Seagate USB disc to the router. It connected first time and it is shared between a PC and a Mac through the router.

I can see all the files, download them and read them. But I cannot delete any file or folder or move them on disc. I initially left the setting as 'share all' and logged in as a guest. I added a user and tried logging in as that - no difference. I tried turning off global folder sharing and enabling specific folder sharing - no difference. The results are identical on both the PC and Mac.

Any suggestions?