Hello,
I just installed Budgie, using two partitions. A first one with the / mount point and the other with the /home mount point.
I notice that the system folder /boot /etc/ /var, etc… appears in my personal folder as well as on the system partition mounted as /.
How could it be ?
Hi @Neelix!
This seems rather strange to me. 
Please open the terminal (Ctrl Alt t) and enter this line to display the tree structure of your “/home” directory:
tree -d -L 1
Could you post the return by copying and pasting it into your message (“<>” button)?
neelix@cochrane-linux:~$ tree -d -L 1
.
├── bin
├── boot
├── Bureau
├── cdrom
├── Desktop
├── dev
├── Documents
├── etc
├── Images
├── Modèles
├── Musique
├── opt
├── Public
├── snap
├── Téléchargements
├── Vidéos
32 directories
Entering this command, I notice that not all system directories are present. Some like /usr or /var are missing.
Yes, I see.
And what do these lines say?
tree boot -d -L 1
tree etc -d -L 1
tree opt -d -L 1
neelix@cochrane-linux:~$ tree boot -d -L 1
boot
├── efi
├── grub
└── grub.bak
4 directories
neelix@cochrane-linux:~$ tree etc -d -L 1
etc
├── acpi
├── alsa
├── alternatives
├── apache2
├── apm
├── apparmor
├── apparmor.d
├── apport
├── apt
├── avahi
├── bash_completion.d
├── binfmt.d
├── bluetooth
├── brltty
├── ca-certificates
├── chatscripts
├── clamav
├── console-setup
├── cracklib
├── cron.d
├── cron.daily
├── cron.hourly
├── cron.monthly
├── cron.weekly
├── CTparental
├── cups
├── cupshelpers
├── dbconfig-common
├── dbus-1
├── dconf
├── default
├── depmod.d
├── dhcp
├── dictionaries-common
├── dkms
├── dnscrypt-proxy
├── dnsmasq.d
├── doc-base
├── dpkg
├── e2guardian
├── emacs
├── environment.d
├── firefox
├── fonts
├── fwupd
├── gdb
├── geoclue
├── ghostscript
├── gimp
├── glvnd
├── gnome
├── gnome-system-tools
├── groff
├── grub-customizer
├── grub.d
├── grub.d.bak
├── gss
├── gtk-2.0
├── gtk-3.0
├── guest-session
├── hp
├── ifplugd
├── ImageMagick-6
├── init
├── init.d
├── initramfs-tools
├── ipp-usb
├── iproute2
├── java-21-openjdk
├── java-8-openjdk
├── kernel
├── ldap
├── ld.so.conf.d
├── libblockdev
├── libibverbs.d
├── libnl-3
├── libpaper.d
├── libreoffice
├── lightdm
├── lighttpd
├── logcheck
├── logrotate.d
├── lxc
├── mame
├── ModemManager
├── modprobe.d
├── modules-load.d
├── mysql
├── netplan
├── network
├── networkd-dispatcher
├── NetworkManager
├── newt
├── ODBCDataSources
├── openal
├── OpenCL
├── openni2
├── opt
├── PackageKit
├── pam.d
├── pcmcia
├── perl
├── php
├── phpmyadmin
├── pki
├── pm
├── polkit-1
├── ppp
├── privoxy
├── profile.d
├── proftpd
├── pulse
├── python2.7
├── python3
├── python3.10
├── rc0.d
├── rc1.d
├── rc2.d
├── rc3.d
├── rc4.d
├── rc5.d
├── rc6.d
├── rcS.d
├── rsyslog.d
├── samba
├── sane.d
├── security
├── selinux
├── sensors.d
├── sgml
├── skel
├── snmp
├── snmp-mibs-downloader
├── spacefm
├── speech-dispatcher
├── ssh
├── ssl
├── sudoers.d
├── sysctl.d
├── systemd
├── terminfo
├── texmf
├── thermald
├── thunderbird
├── timidity
├── tmpfiles.d
├── ubuntu-advantage
├── udev
├── udisks2
├── ufw
├── update-manager
├── update-motd.d
├── update-notifier
├── UPower
├── usb_modeswitch.d
├── vbox
├── vim
├── vmware
├── vmware-installer
├── vmware-tools
├── vmware-vix
├── vulkan
├── wpa_supplicant
├── X11
├── xdg
├── xfce4
└── xml
168 directories
neelix@cochrane-linux:~$ tree opt -d -L 1
opt
├── brave.com
├── calibre
├── google
├── libreoffice24.2
├── libreoffice24.8
├── libreoffice25.2
├── master-pdf-editor-5
├── wine-staging
└── XnView
10 directories
These folders seems to be the ones from my old Xubuntu.
Wow! 
I’m wondering how you managed to achieve this result.
Also, why is there a “grub.bak” folder in the “/boot” directory? Is it left over from some other configuration?
My advice isn’t very professional, but you should try renaming the three directories “/boot”, “/etc” and “/opt” to “/boot0”, etc. to see if your system still boots and if the main applications in the other two directories (Thunderbird, Brave, Libreoffice) still work correctly.
If this is the case, you can delete these three directories. If not, I’d advise you to reinstall from scratch, after backing up any important personal files, and choosing “Manual partitioning” as the installation type.
hmm - have you somehow done an install over the top of a previous Xubuntu install, but you didn’t erase the Xubuntu partition first?
Me Too ! 
These was was my old system files. So, I could remove them.
Thank you.