How to partition a 2TB external drive to use with TM for a 250GB backup?

My MBP only has a 250GB hard drive, but the new external drive is 2TB. I don't want to use the whole ext drive for TM back-up so what size should I create the TM backup partition so that I can use the rest for regular file storage? I saw a guideline in the FAQ that said you need 2-3x the size of the data back-up for TM. So is 500GB for TM and 1.5TB for storage a good size?
Separately, will TM recognize to use the correct partition once they are re-sized and there is a new partition on the ext drive?
Thanks

vpr80 wrote:
is 500GB for TM and 1.5TB for storage a good size?
i'm backing up three Macs to my 500 GB TC.
who needs two year old files ... let TM start clearing out the old junk earlier.
JGG

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