Another option that is POSSIBLE (but I'm not sure it is recommended) with the newer memory modules (CF) and Sup720 in native mode would be to use a USB flash memory drive to read and write the files to CF. Obviously you'd want to verify this in a non-production switch to make sure the formatting is compatible and the file is readable, but I have been able, on my 6513 with Sup720-3BXL and my USB 7-in-1 drive to read/write the CF after formatting it on the Cisco first and copy new code version to the CF card then insert & verify the bin file.
Please also note the SXD3 is deferred and is not recommended for deployment last I knew and can have a bad bug if you accidentally create a subdirectory on the CF card (while using the above method) where the whole switch will reboot and continue to reboot - SXD4 or SXD5 if it exists is the current recommended in that release train for SXD I think..
It's a documented bug in the bug tool, but doesn't SPECIFICALLY state that a subdirectory will trigger it, only "corrupted flash", which is what the IOS in that version thinks the directory existing really is... SXD4 fixes that bug. OR, even easier, don't create subdirectories on it if you are using a PC to transfer images to the CF! :-)
Either using FTP or a different TFTP server, as Amit and the other poster mentioned, will also work.
