If the file is already stored somewhere on the Telegram servers, you don't need to reupload it:
each file object has a file_id field, simply pass this file_id as a parameter instead of uploading.
It is not possible to change the file type when resending by file_id.
It is not possible to resend thumbnails using file_id.
They have to be uploaded using one of the other Input methods.
If the file is already stored somewhere on the Telegram servers, you don't need to reupload it: each file object has a file_id field, simply pass this file_id as a parameter instead of uploading.
It is not possible to change the file type when resending by file_id.
It is not possible to resend thumbnails using file_id. They have to be uploaded using one of the other Input methods.
There are no limits for files sent this way.