Was wondering why my hosting space is disappearing and checked what folder contains most Mbs - it appeared to be "wpcf7_uploads"... so it seems that all files that were sent via contact form are now stored at my hosting.
And as it is written in File Uploading and Attachment
By Takayuki Miyoshi :
Contact Form 7 attaches the file to the mail and sends it. After these procedures, Contact Form 7 then removes the file from the temporary folder.
Is there something wrong with plugin?