i have moved some bloatware to the sd card and want to change the apk to bak but some files i.e. buudies now have 2 files an apk and oedx(?) file. what can i change the non apk file to in order to get more space
You can move both the APK and it's associated ODEX file to the SD card. If you do so, you don't need to rename them. Just create an apps folder on the SD card and stick everything in there for safe keeping.