How long a draft ITR2 filed under online return filing remain on the site?

I started filling up the ITR 2 and was more or less done with all the line items of Capital Gains filled. I kept it for a day and two days later everything was gone. The screen says no saved drafts - start new filing.

Any idea how long the online draft remains? Does it mean that I will open the draft everyday and save it afresh?

Please let me know.

Thanks