Problems with sys-usb, affecting usb keys/ssd in appVM on a fresh updated 4.3rc3 install

[intoqubes]

Yes, sys-usb and sys-net are in minimal state in Q4.3rc3, as I saw afterwards stated here Qubes OS 4.3 release notes — Qubes OS Documentation

Minimal state qubes to make NetVM and USBVM to consume as little RAM as possible.

Previous Qubes 4.2 installs seem to have the same amount of memory for sys-usb.
I didn’t note my 4.2 settings, but here I found some indications (dating 2022) :
https://forum.qubes-os.org/t/questions-on-memory-allocations-for-sys-qubes/13045/2

@tanky0u

the default startup memory values set to 400 MB and 300 MB for sys-net and sys-usb, respectively

@flavio

Sys-net needs to have access to hardware, so it runs HVM, which does not support ballooning/balancing. Same applies to sys-usb. Sys-firewall, on the other hand, is a standard pvh, so balancing works well with it.

Sys-usb was already 300 Mo, and not included in memory balacing. With these settings, I didn’t have problems with Q4.2.

Should I increase the minimal memory in Qubes 4.3 to have sys-usb attach properly any usb devices to AppVMs (and opening Thunar, as it is AFIK the single way of browsing an android phone, with mtp, in sys-usb, and I like being able to browse pictures to transfer only the ones I want) ?

Thanks for your help !