Hi Josh, I had a issue like this once with another rtos. What it ended up being was the file system had a variable that limited the number of open files at once. It manifested itself as a comms error just like what your are describing with respect to getting the broken like icons. Karol, Do you know if there is a register for FileX that says how many open files you can have at the same time, or any other FileX settings that might be of some interest in this case? As far as the 1.5MB file being corrupted, can you try reading the file in and then writing it back out again to onto the usb disk and see if it is intact. That way maybe isolate the usb and file system from that part of the system. Have you fired up wireshark to look at the packets to see if the receiver is getting bad packets and asking for retries? Good luck Josh. Matt
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