file write IOError Invalid argument

Hello All, I am trying to write a binary string to file on a windows network share. I get an IOError. I've read that it is because the file size is too large. I did a type( binaryString) and saw that it was type "str". So I loop through it one by one element and use f.write to write to file, and

fil open close very slow

hiya all, I have a "large" script written in python. There is in that big script at a certain point a loop in which I create a lots of simple small text files. Each text file just contain I think 4 or 5 short lines. When I simply run it in IDLE, it runs fast. But when I compile it to binary file