Drupal does not support download resume , meaning that downloading large private files can be troublesome because if for any reason the download fails , there is no way to continue downloading from where it stopped and the whole file should be downloaded again.

NOTICE : This module does not need any patch to work

NOTICE : Please join and contribute if you're interested to have this useful feature in core : #91934: Content-range support for file_transfer()


* Multi Part/Section file download
* Resumable file download
* Download speed limit support
* Automatic client download abort detection


There is also x-send module that does the same but it depends on an Apache module and it doesn't have Drupal 7 version yet and also another xsendfile module that is for Drupal 7

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