There are two memory cards, the internal fake card at
/mnt/sdcard and the one you physically put into the phone
/mnt/sdcard-ext. With that TiBu normally puts the backup on the sdcard, which for our phones is the internal memory. So if you want it to backup to your external memory card, do the following:
#1 - Using any file explorer navigate to your sdcard-ext and create a folder called
TitaniumBackup or any backup name you want
#2 - Open TiBu,
#3 - hit
menu
#4 - Then select
preferences
#5 - Scroll down and select
Backup folder location. It should say /mnt/sdcard/TitaniumBackup
#6 - Press the
back button, normally that would exit the menu, but does not in this case
#7 - Press the
back button again, it should now say
/mnt at the top
#8 - Scroll down and select
sdcard-ext
#9 - Scroll down and select
TitaniumBackup
#10 - Press the
Use the current folder
Now your backups will be saved to your memory card
And if you already have backups, it will ask if you want to move them to the new location