Unable to convert aac (m4a) to another format

I have hundreds of m4a files in iTunes, and I want to convert them mp3.
however every time I try, I get an error message
"Error occurred while converting the file "myFileName". The disk could not be read from or written to."
now, I know you'd generally think that my permissions are set incorrectly, but I've checked that the files have read/write access.... I even tried converting them to WAV and AAC instead but same issue. Weirdly, MP3 files in the same folder can be converted to another format.
I tested converting a problem AAC file outside of iTunes using 3rd party software and it worked.
It seems to be that my AAC (mp4a) files are being stubborn inside iTunes. anyone know why?

First, M4A stands for MPEG 4 Audio. It's an AAC file inside an MPG envelope. AAC is the successor of MP3, providing better quality at lower file sizes. In addition, people distributing content don't need to pay royalties to use AAC.
To convert these files to MP3 files, there is two ways for you:
#1. go to into the Preferences panel of iTunes. Click on the orange "Importing" selection and then select an MP3 Encoder for importing. Change the settings to whatever you want. Now, click OK and go back to the main window of iTunes. Select all songs you want to convert to MP3 and click on "Advanced" -> "Convert Selection to MP3".
iTunes knows a second AAC format called M4P. This is the protected version. It cant be converted to MP3 as easily. If you want to convert it to MP3, do this: First, burn the songs you want to convert onto an Audio CD (preferrably an CD-RW so you can erase it again afterwards). Now, import those songs again, this time into MP3 files.
#2.you can use a video converter software, here i recommend you Leawo Video Converter,this video converter can help you to convert aac audio format to mp3 files easily. You can find this software here. http://www.leawo.com/leawo-video-converter/
wish ican help you!
Message was edited by: jimmy6280

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Message was edited by: Dave Sawyer

Unable to convert aac (m4a) to another format

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