Well written

On the other hand, the download is slow as it is. If nothing happens for several tens of minutes after switching on, this has a significant negative impact on the overall download rate.

My computer is not running most of the day during the week.

Over twenty minutes is a lot of patience.

I also often get:
Network: ERR-SymmetricNAT

Although nothing changed.

I have the problem that I2PSnark does not work after waking up from Windows Hibernation. I have the status "Tracker Error". Is there at least a workaround for this? Probably I have to restart the service always after waking up from sleep. So I am also wondering if the problem is I2P itself.

In times of SSD, defragmentation no longer counts.

I have worked around the problem with file system compression.

It seems that the complete space that the package has at the end is allocated. How can I set this so that only the space actually needed is used?

In my research I found PicoTorrent. The client is maybe somewhat minimalist, but otherwise sufficient. What I could not find is how to configure it safely.

Yes, I know this and have tested it. For me as a qBittorrent user BitlyBT is bloadware as it uses much more ressources and I haven't managed to keep it from leaking to the clear net.

Maybe you have one recommended site that helps to configure the program properly.

Is there a more modern GUI for IPSnark? For one thing, I find it inconvenient to go to the website every time to manually add torrents one by one. In normal torrent programs, it is enough to simply click on a magnet link on a website so that it is automatically added to the torrent list. In addition...