Re-downloading already downloaded and checked files #7677

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opened 2026-02-21 19:06:42 -05:00 by deekerman · 2 comments

deekerman commented

2026-02-21 19:06:42 -05:00

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Originally created by @Ajaxtomas on GitHub (Aug 29, 2018).

Please provide the following information

qBittorrent version and Operating System

v4.1.2 qBittorent version, Windows 10 Professional 64-bit

If on linux, libtorrent and Qt version

(type here)

What is the problem

qBittorent starts to download already downloaded and checked files after disconnecting hard drive, where i had my torrents' files stored

What is the expected behavior

show that files are missing, not download them again after clicking "continue" option, but start to seed them as before.

Steps to reproduce

"force to check" option, which starts to check about 50 torrents of very high size

Extra info(if any)

I brought this up because I'm moving from uTorrent, where this problem isn't, and I want to help you polish this project as much as I can provide by feedback.

https://qbforums.shiki.hu/index.php/topic,5995.msg28371.html#msg28371 a guy who had the same problem

Originally created by @Ajaxtomas on GitHub (Aug 29, 2018). **Please provide the following information** ### qBittorrent version and Operating System v4.1.2 qBittorent version, Windows 10 Professional 64-bit ### If on linux, libtorrent and Qt version (type here) ### What is the problem qBittorent starts to download already downloaded and checked files after disconnecting hard drive, where i had my torrents' files stored ### What is the expected behavior show that files are missing, not download them again after clicking "continue" option, but start to seed them as before. ### Steps to reproduce "force to check" option, which starts to check about 50 torrents of very high size ### Extra info(if any) I brought this up because I'm moving from uTorrent, where this problem isn't, and I want to help you polish this project as much as I can provide by feedback. https://qbforums.shiki.hu/index.php/topic,5995.msg28371.html#msg28371 a guy who had the same problem

deekerman

2026-02-21 19:06:42 -05:00

closed this issue
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deekerman commented

2026-02-21 19:06:47 -05:00

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@soder10 commented on GitHub (Sep 5, 2018):

I can second this bugrequest:

Plugin a USB drive, download some torrent to that drive, wait until the download is 100% completed. Exit Qbittorrent. Remove the USB drive (safe remove, not barbaric plug out the USB cable!), start qbittorent: it will complain about missing files in the downloaded torrent. Which is correct at this point. Now, exit qbittorrent again. Re-attach your previous USB drive, confirm in windows explorer you can see the downloaded torrent files 100% complete. Re-start qbittorrent: it still complains about missing files! Try to start one of those torrents to force qbittorent to realise that the files are available 100% again. What qbittorrent will try to do instead? It will mark the torrent as 0% complete, and starts to re-download all the content from scratch, overwriting the 100% completely downloaded files immediately. Dozens of gigabytes of already downloaded content gets wasted in a millisecond...

No matter if you try to force a verify of these torrents after that point, qbittorrent will still mark as 0% complete, will not recognise the downloaded files are all there 100% completed.

@soder10 commented on GitHub (Sep 5, 2018): I can second this bugrequest: Plugin a USB drive, download some torrent to that drive, wait until the download is 100% completed. Exit Qbittorrent. Remove the USB drive (safe remove, not barbaric plug out the USB cable!), start qbittorent: it will complain about missing files in the downloaded torrent. Which is correct at this point. Now, exit qbittorrent again. Re-attach your previous USB drive, confirm in windows explorer you can see the downloaded torrent files 100% complete. Re-start qbittorrent: it still complains about missing files! Try to start one of those torrents to force qbittorent to realise that the files are available 100% again. What qbittorrent will try to do instead? It will mark the torrent as 0% complete, and starts to re-download all the content from scratch, overwriting the 100% completely downloaded files immediately. Dozens of gigabytes of already downloaded content gets wasted in a millisecond... No matter if you try to force a verify of these torrents after that point, qbittorrent will still mark as 0% complete, will not recognise the downloaded files are all there 100% completed.

deekerman commented

2026-02-21 19:06:47 -05:00

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@Piccirello commented on GitHub (Aug 4, 2019):

Duplicate of #127

@Piccirello commented on GitHub (Aug 4, 2019): Duplicate of #127