If you use NTFS there isn't problem with 4 GB or more but if you need to 
burn a dvd you may encounter some problem with file bigger than 2 GB 
because you can do it only with the UDF file system and it is not so 
well supported.
If 7-zip appears slow you can try to loose some compression and it will 
be much faster.
    Nic

Dr Skip wrote:
> Thanks to all who responded, it's helped me quite a bit. I did get one solution 
> working last night - enough that it might be the one (one line, wrapped):
>
> 7za.exe a -v4g -scsWIN -t7z "K:\gz\Backup of Profile Untitled made on Thursday, 
> 12-Jun-2008.7z" -mx=5  -w"c:\TEMP\" @"K:\gz\Backup of Profile Untitled made on 
> Thursday, 12-Jun-2008~.txt"
>
> That's 7-zip, telling it to split at 4GB, use the 7z format, work in the temp 
>   
>

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