Email attachment search

Hi,

I keep receiving emails that we are on 80% of our storage limit and therefore I want to go in and remove some email attachments from when they have been tracked. I am using the advanced find, however, when I search within E-mail messages - E-mail attachments - File size (bytes) I can then pull up all the emails with attachments, however...

I can not add a column which will inform me of the actual size of attachments, which makes it very difficult. Any hints/tips would be greatly appreciated.

Thanks