I’m not sure if I understand what are your trying to do. When you have an external drive und you plug it into the USB port of a power strip, where does the data go then? 
With a Y-shaped cable
Ah okay, I didn’t had these in mind
Yea sure, it should deliver extra power.
Well, it’s still the same, I don’t know what else to try
Maybe you can ask in qbittorent forums about this problem
Now I have another problem, since I wanted to put everything back to 0 in qBittorrent and I uninstalled it to install it again, but it gives me an error when I reinstall it. I think the problem is that I changed the repository to see if it gave me more updated versions and now It doesn’t even install it for me, how do I go back to the original repository?
I hope you did a backup before playing around? If not you probably remember what you changed? At least you could share the error message.
APT update
│ - Command: apt-get -y -eany update
│ - Exit code: 100
│ - DietPi version: v8.18.2 (MichaIng/master) | HW_MODEL: 4 | HW_ARCH: 3 |
│ DISTRO: 6
│ - Error log:
│ Ign:1 http://ppa.launchpad.net/qbittorrent-team/qbittorrent-stable/ubuntu
│ mantic InRelease
│ Hit:2 https://deb.debian.org/debian bullseye InRelease
│ Hit:3 https://deb.debian.org/debian bullseye-updates InRelease
│ Get:4 https://deb.debian.org/debian-security bullseye-security InRelease
│ [48.4 kB]
│ Hit:5 https://deb.debian.org/debian bullseye-backports InRelease
│ Err:6 http://ppa.launchpad.net/qbittorrent-team/qbittorrent-stable/ubuntu
│ mantic Release
│ 404 Not Found [IP: 185.125.190.52 80]
│ Hit:7 https://archive.raspberrypi.org/debian bullseye InRelease
│ Reading package lists...
│ E: The repository
│ 'http://ppa.launchpad.net/qbittorrent-team/qbittorrent-stable/ubuntu mantic
│ Release' does not have a Release file.
You added an Ubuntu repository which is a very bad thing at all because DietPi is based an Debian. This one needs to be removed completely.
Made. It hadn’t occurred to me to delete the repository directly, I thought I had to change it to another. Thank you!! That said, the qBittorrent thing keeps failing me, let’s see if I can ask in any official forum of this
Just formatted and still the same… 
EDIT: Could it be a permissions issue?
With wrong permissions you could not write anything.
I think it’s a problem of your ISP or within qbittorent itself.
did some testing on my RPi4B as well as Orange Pi5. On both systems I just installed Qbit from software catalogue (no further configurations). On all seeds together I got around 50Mib/s, which is the max on my internet connection.
Did you check the sum of all seeds or just a single one?
Check how fast you can download some linux distribution like Ubuntu.
Here are links to newest torrent
https://releases.ubuntu.com/22.04/ubuntu-22.04.2-desktop-amd64.iso.torrent
https://releases.ubuntu.com/23.04/ubuntu-23.04-desktop-amd64.iso.torrent
Ah yeah I was testing with RPI desktop image 
It starts like this for me, but in 1-2min my speed drops a lot and stays below 10-5MB/s
The same happens to me. It starts off very strong downloading, and when it takes 1min or so the speed slows down a lot and drops to around 5MB/s and even KB/s. I have tried to power the hard drive even with a good mobile charger and not even with those.
Could installing qBittorrent in Docker solve something?
You can try but I don’t think so.
Maybe your board is overheating?
After some research I installed qBittorrent v4.5.5 Web UI (64-bit) and it is working stable.
Problems with fast and slow download speed fluctuations are with disk speed.
I download to HDD (spinnig) disk qBitorrent when I switched to SSD drive download speed was stable and high.
-
Check when downloading torrents look at View → Statistics
-
Look at Write cache overload and Queued I/O jobs if they are high numbers then your disk is to slow for such fast donwload speed.
You can test speed of your disk in dietpi-drive_manager
Set limit download speed slower then speed of write of your disk.