25 lines
882 B
Markdown
25 lines
882 B
Markdown
# Troubleshooting Transfer
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You can’t drag and drop more than one hex file at once onto your micro:bit. If
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you try to drag and drop a second hex file onto your micro:bit before the first
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file has finished downloading, then the second file may fail in different ways.
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When the first program has been written to the micro:bit, the drive will
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disengage. If you drag and drop a second file at this point it may not find the
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drive and the second write will fail.
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The errors may look like this:
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**Windows**
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![](/static/mb/device/usb-windows-copy-file-error.jpg)
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**Mac**
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![](/static/mb/device/usb-osx-copy-file-error.png)
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Or it may appear that there are two hex files on your micro:bit so the micro:bit
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won’t be able to run multiple files. To rectify this, unplug your micro:bit and
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plug it in again. Make sure that your micro:bit appears as `MICROBIT` and not
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`MAINTENANCE`.
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