Thats bang on, I was looking for. I have a backup job under maintenance plan but it doesnt delete the files after a week and I am having files getting...

I wanted him to check if he can take txn log backup, take it delete it, shirnk the db and revert back to simple model. as you rightly pointed out...

can you try changing it to full recovery, take transaction log backup and try shrinking the database, though this is not relates to your error