That is down to the unfortunate difference in how storage media capacities are labelled by the vendors, and how in almost all other applications it is calculated. 
	 
	When a storage vendor labels it  32gb, it is 32x10^9 = 32x1000x1000x1000 = 32,000,000,000 bytes 
	 
	When a computer calulate a file to be 32gb it is 32*2^30 = 32x1024x1024x1024 = 34,359,738,368 bytes and therefore will not fit on 32gb drive.  
	 
	The 29,6 you see, is as calculated by a computer. 32 metric gb is roughly 29,8 binary gb, so only about 200mb is lost to formatting, not  2,4gb. 
	 
	Just an explanation. Doesn't really help now, but perhaps for the future.