First, I need to educate you - and then caution you - about what you are attempting to do.
Let me start off by telling you that you are correct: your phone has 230 mb for internal storage. However, when Motorola manufactured the i1, they installed a 600MHz Freescale ARM 11 Processor. This processor can handle up to a 32 GB capacity micro SD memory card. This is a large capacity card and there's a reason for it.
Specifically, the processor in your phone also requires a large portion of your internal memory to be free - so it can run / perform as fast as it can. With your internal memory full, your processor will slow WAY down, and will become susceptible to freeze-ups.
As such, your phone pretty much requires you to use a PC to transfer files both, to and from your memory card. This is actually to keep you from constantly getting a Low Memory
message from your internal memory being full. And, with only 230 mb of memory (which isn't much) it wouldn't take long to fill it up - and slow the processor in your phone down - with photo's and music.
To be sure, in your phone's manual on page 36 it reads: "Your music is stored on your memory card. Your phone supports removable microSD memory cards up to 32 GB capacity."
This is Motorola's way of telling you to ONLY use your memory card to store music and not your phone's internal memory.
Moreover, on page 42 of your phone's manual it reads: "You can transfer your pictures, videos, music, ringtones, and more, from your computer to your phone's memory card." Again, Motorola point is to tell its i1 customers to use their memory card and not their internal memory for storage.
I'm telling you this for a reason. Working here at FixYa, I receive request every day for assistance when a person's phone freezes up. It is almost always because they were using their phones internal memory for storage and got it too full.
You really should use a computer to transfer files both, to and from your phone's memory card and keep as much of your phones internal memory as free as possible.
Here's a link to an online manual for your phone if you would like to review the pages I've talked about. And, I hope you follow my advise.
Click here: http://www.motorola.com/staticfiles/Support/US-EN/Mobile%20Phones/i1/Documents/Static-Files/i1_Boost_UG-EN_NNTN8085A.pdf