it depends on the internal memory , or more precisilely the part dedicated to profile storage :
Let's imagine the lowest option : 2 MB : 512 profiles ( 4 kB for a single profile ) we're much above ( with 1400 )
at 2GB (that can be much closer to reality, I guess) : 512 000 !!!
If someone as the internal memory specs we can guess , but there are other limitations ( ie number of files / inodes ....)
The short answer is : don't bother about it....
No, I don't bother at all. I was just curious about how much storage capacity has this thing, so I was trying to force the unit to its limits and see where it goes....I'm really using 5 different sounds only....It would be great to know specs of the machine as the manual is a complete shit.