I am planning to buy a Phantom 3 standard. I believe it comes with a 8gb card? How much memory does a 25 min video in 2.7k take? If I wanted a bigger card would one of these work - http://www.ebay.com/itm/SanDisk- ... roJnAksnLtYjeDclKWQ

SanDisk Ultra Class 10 UHS-I is a good one. 64gb is te maximum capacity that the phantom can read

For 4K video you need about 0.5 GB per minute.
For 2.7K it would be considerably less.
It should be a simple thing to test yourself to find out.

Hello ezdrew430, here are 3 recommended cards.Hope it helps:
1）        Lexar 633X Class10 16GB MicroSDHC UHS-I ；
2）        Panasonic 16GB MicroSDHC UHS-3 ；
3）        Sandisk Extreme 16GB MicroSDHC UHS-3

If you buy directly from DJI, it should come with a 16gb memory card. For photos that should be more than enough, but 2.7k video you will want at least a 32gb, if not 64gb

I seem to recall, from another forum thread, that there's a file size limit on cards with FAT format. So you may not be able to realize a continuous 25 minute (battery pack flight time) video.

The P3S supports both FAT and exFAT, depending on card capacity.

Airspace Explor Posted at 2016-6-14 09:23
I seem to recall, from another forum thread, that there's a file size limit on cards with FAT format ...

Yes, but it does not alter the way the Phantom splits the files at the 4 GB boundary, it does it no matter what format scheme you use, it will always split the file.

So what will you be filming that will keep the viewer's attention for 25 minutes of continuous flight time?

But that does bring up an idea for a new feature: A user selectable continuous loop time. Can be used to record the last few moments before the crash - all in spectacular HD, of course.

Those are Sandisk Ultra cards, they are just on the border of working. They may just work at 2.7K, but not reliably at 4K. Better to buy the Sandisk Extreme series and also, don't buy them off eBAy, no guarantees.

shayanza@usc.ed Posted at 2016-6-14 09:05
If you buy directly from DJI, it should come with a 16gb memory card. For photos that should be more ...

You can get 3 hrs of 2.7K video on a 64GB card - that's 9 batteries unedited - Half that for 32GB.
Both sound like overkill and unnecessary.
16GB cards would be fine.