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You can't, but you can convert from FAT32 to NTFS without losing any data. It's a perfectly valid question. There could be some utility out there like the CONVERT command but for Mac. I haven't seen one, but it's not out of the realm of possibility...

Sorry, I formed that question wrong. I was genuinely curious, reading it again it sounds more pretentious than anything.

I had never known of any formatting process that allowed you to keep data.
 
Definitely a 256GB SSD MBA if I were you. If you can afford it, bump it up to the 512GB and the 11 inch version is great due to the size. It's just slightly larger than an iPad but with a maxed out MBA, you can do most normal functions faster than probably 90% of the laptops out there. The only reason to go for a rMBP would be for gaming or if you need a single machine for high speed rendering while on the road. I'm a photographer and I don't even need the rMBP but I do have a render farm.
 
Sorry, I formed that question wrong. I was genuinely curious, reading it again it sounds more pretentious than anything.

I had never known of any formatting process that allowed you to keep data.

I haven't either. A "conversion" process would not be formatting. All formatting I have ever seen destroys data.

Formatting is the only way I have found to convert NTFS to Mac and vice versa. I Googled for some conversion utility, and all I could see was FAT32 to NTFS. I also probably would not trust a conversion utility anyway even if it existed. I'm old fashioned. :D
 
http://www.youtube.com/watch?v=i3hOFFUTJG4

I just bough 2 more external passport drives to use with my mac. I'll be fine guys. The point to OP was just to convey that initially it came as a shock to me that I couldn't write to the 10TB I have. It's something that is understated and not made obvious to windows->Mac converts.
 
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