i read about maximum storage is 250 mb in anki web.
but is there any storage limit if i use the content only on my pc.
i used to export decks to my Friend so is there any limit on size of exporting file
There is no practical limit for local decks, as far as I know. (I just downloaded a 1.54 GB deck )
also is there any limit in size of file for exporting the deck.
No, there is no limit.
Even the ankiweb limit is really hard to reach, as it does not take into account the media collection (for which, for the time being, there is no hard limit), and it’s usually what takes place.