Cannot set drive size

**Describe the issue**
I want to have a fairly large amount of space for my VM, but whenever I set it, click save, and re-open the menu it shows that only 197 KB is available. I have enough space on my device.

**Configuration (required)**
* UTM Version: 4.0.9
* OS Version: iPad OS 15.5b4
* Device Model: iPad Air 5
* Is it jailbroken (name jailbreak used)? None
* How did you install UTM? TrollStore

**Crash log**
If the app crashed, you need a crash log. To get your crash log, open the Settings app and browse to `Privacy -> Analytics & Improvements -> Analytics Data` and find the latest entry for UTM. You should export the text and attach it here.

**Debug log**
For all issues, _including_ crashes, you should attach a debug log. Open UTM, and open the settings for the VM you wish to launch. Near the bottom of the configuration options (or at the top of the `QEMU` page) is `Debug Log`. Turn it on and save the VM. After you experience the issue, quit the VM and re-launch UTM. Open the VM settings again and select `Export Log...` and attach it here.

**Upload VM**
(Optional) If possible, upload the `config.plist` inside the `.utm`. If you do not have this, you can upload the entire `.utm` but note this contains your personal data. Since GitHub has an attachment size limit, you may want to upload to another service such as Google Drive. Link it here.

[config.zip](https://github.com/utmapp/UTM/files/9854287/Zip.archive.zip)

Why does GitHub not support plists?