diff --git a/sdata/step/exp-uninstall.sh b/sdata/subcmd-exp-uninstall/0.run.sh
similarity index 100%
rename from sdata/step/exp-uninstall.sh
rename to sdata/subcmd-exp-uninstall/0.run.sh
diff --git a/sdata/options/exp-uninstall.sh b/sdata/subcmd-exp-uninstall/options.sh
similarity index 100%
rename from sdata/options/exp-uninstall.sh
rename to sdata/subcmd-exp-uninstall/options.sh
diff --git a/sdata/step/exp-update-old.sh b/sdata/subcmd-exp-update-old/0.run.sh
similarity index 100%
rename from sdata/step/exp-update-old.sh
rename to sdata/subcmd-exp-update-old/0.run.sh
diff --git a/sdata/options/exp-update-old.sh b/sdata/subcmd-exp-update-old/options.sh
similarity index 100%
rename from sdata/options/exp-update-old.sh
rename to sdata/subcmd-exp-update-old/options.sh
diff --git a/sdata/step/exp-update.sh b/sdata/subcmd-exp-update/0.run.sh
similarity index 98%
rename from sdata/step/exp-update.sh
rename to sdata/subcmd-exp-update/0.run.sh
index 32d90ebec..632d63082 100644
--- a/sdata/step/exp-update.sh
+++ b/sdata/subcmd-exp-update/0.run.sh
@@ -3,6 +3,16 @@
 
 # shellcheck shell=bash
 
+#####################################################################################
+# Notes by @clsty:
+#
+# I'm not the one who developed this script (see issue#2284 which discussed about the history).
+# However it contains many unnecessary logics. This is typically what AI will do.
+# I don't really care if it's AI-generated or not, it's just an extra option in addition to ./setup install, so as long as the users say it works, it should be fine.
+# However, it's not easy to maintain something like this.
+# The redundant logic should be cleaned up someday.
+#
+# This also applies for exp-update.tester.sh, TBH I don't think that file is really needed, and it also looks like AI-generated. Just guessing though.
 #####################################################################################
 #
 # exp-update.sh - Enhanced dotfiles update script
diff --git a/sdata/step/exp-update-tester.sh b/sdata/subcmd-exp-update/exp-update-tester.sh
similarity index 96%
rename from sdata/step/exp-update-tester.sh
rename to sdata/subcmd-exp-update/exp-update-tester.sh
index 9b467d7a1..15e93f150 100755
--- a/sdata/step/exp-update-tester.sh
+++ b/sdata/subcmd-exp-update/exp-update-tester.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# exp-update-tester.sh - Test suite for exp-update.sh
+# exp-update-tester.sh - Test suite for exp-update
 #
 set -euo pipefail
 
@@ -129,7 +129,7 @@ log_header() { :; }
 log_die() { echo "ERROR: \$1"; exit 1; }
 STY_CYAN="" STY_RST="" STY_YELLOW=""
 
-# Set required environment variables for exp-update.sh
+# Set required environment variables for exp-update/0.run.sh
 SKIP_NOTICE=true
 REPO_ROOT="\$1"
 CHECK_PACKAGES=false
@@ -139,7 +139,7 @@ VERBOSE=false
 NON_INTERACTIVE=true
 SOURCE_ONLY=true
 
-source "$ORIGINAL_DIR/sdata/step/exp-update.sh"
+source "$ORIGINAL_DIR/sdata/subcmd-exp-update/0.run.sh"
 detected_dirs=\$(detect_repo_structure)
 if [[ -n "\$detected_dirs" ]]; then
   read -ra MONITOR_DIRS <<<"\$detected_dirs"
@@ -190,7 +190,7 @@ log_success() { :; }
 log_header() { :; }
 log_die() { echo "ERROR: \$1"; exit 1; }
 
-# Set required environment variables for exp-update.sh
+# Set required environment variables for exp-update
 SKIP_NOTICE=true
 REPO_ROOT="\$1"
 CHECK_PACKAGES=false
@@ -200,7 +200,7 @@ VERBOSE=false
 NON_INTERACTIVE=true
 SOURCE_ONLY=true
 
-source "$ORIGINAL_DIR/sdata/step/exp-update.sh"
+source "$ORIGINAL_DIR/sdata/subcmd-exp-update/0.run.sh"
 detected_dirs=\$(detect_repo_structure)
 if [[ -n "\$detected_dirs" ]]; then
   read -ra MONITOR_DIRS <<<"\$detected_dirs"
@@ -276,7 +276,7 @@ log_success() { :; }
 log_header() { :; }
 log_die() { echo "ERROR: \$1" >&2; exit 1; }
 
-# FIXED: Set REPO_ROOT before sourcing exp-update.sh
+# FIXED: Set REPO_ROOT before sourcing exp-update
 REPO_ROOT="\$1"
 export REPO_ROOT
 
@@ -293,7 +293,7 @@ HOME_UPDATE_IGNORE_FILE="/dev/null"
 
 # Source the production script to use the real should_ignore function
 # Redirect all unwanted output to stderr, then to /dev/null
-source "$ORIGINAL_DIR/sdata/step/exp-update.sh" 2>/dev/null
+source "$ORIGINAL_DIR/sdata/subcmd-exp-update/0.run.sh" 2>/dev/null
 
 test_cases=(
   "\$REPO_ROOT/app.log:0"
@@ -348,7 +348,7 @@ test_safe_read_security() {
   log_test "Testing safe_read uses secure assignment (printf -v)"
 
   local safe_read_function
-  safe_read_function=$(awk '/^safe_read\(\) \{/,/^\}/' "$ORIGINAL_DIR/sdata/step/exp-update.sh")
+  safe_read_function=$(awk '/^safe_read\(\) \{/,/^\}/' "$ORIGINAL_DIR/sdata/subcmd-exp-update/0.run.sh")
 
   if [[ -z "$safe_read_function" ]]; then
     log_fail "Could not find safe_read function"
@@ -547,7 +547,7 @@ log_success() { :; }
 log_header() { :; }
 log_die() { echo "ERROR: \$1" >&2; exit 1; }
 
-# FIXED: Set REPO_ROOT before sourcing exp-update.sh
+# FIXED: Set REPO_ROOT before sourcing exp-update
 REPO_ROOT="\$1"
 export REPO_ROOT
 
@@ -563,7 +563,7 @@ UPDATE_IGNORE_FILE="\${REPO_ROOT}/.updateignore"
 HOME_UPDATE_IGNORE_FILE="/dev/null"
 
 # Source the production script to use the real should_ignore function
-source "$ORIGINAL_DIR/sdata/step/exp-update.sh" 2>/dev/null
+source "$ORIGINAL_DIR/sdata/subcmd-exp-update/0.run.sh" 2>/dev/null
 
 # Load patterns into cache
 load_ignore_patterns
@@ -649,7 +649,7 @@ VERBOSE=false
 NON_INTERACTIVE=true
 SOURCE_ONLY=true
 
-source "$ORIGINAL_DIR/sdata/step/exp-update.sh" 2>/dev/null
+source "$ORIGINAL_DIR/sdata/subcmd-exp-update/0.run.sh" 2>/dev/null
 
 test_dir="/tmp/test-ensure-dir-\$\$"
 
diff --git a/sdata/options/exp-update.sh b/sdata/subcmd-exp-update/options.sh
similarity index 100%
rename from sdata/options/exp-update.sh
rename to sdata/subcmd-exp-update/options.sh
diff --git a/sdata/step/0.install-greeting.sh b/sdata/subcmd-install/0.greeting.sh
similarity index 100%
rename from sdata/step/0.install-greeting.sh
rename to sdata/subcmd-install/0.greeting.sh
diff --git a/sdata/step/1.install-deps-selector.sh b/sdata/subcmd-install/1.deps-selector.sh
similarity index 99%
rename from sdata/step/1.install-deps-selector.sh
rename to sdata/subcmd-install/1.deps-selector.sh
index c1f4bea0c..ebed1bb04 100644
--- a/sdata/step/1.install-deps-selector.sh
+++ b/sdata/subcmd-install/1.deps-selector.sh
@@ -1,5 +1,6 @@
 # This script is meant to be sourced.
 # It's not for directly running.
+printf "${STY_CYAN}[$0]: 1. Install dependencies\n${STY_RST}"
 
 function outdate_detect(){
   # Shallow clone prevent latest_commit_timestamp() from working.
diff --git a/sdata/step/2.install-setups-selector.sh b/sdata/subcmd-install/2.setups-selector.sh
similarity index 97%
rename from sdata/step/2.install-setups-selector.sh
rename to sdata/subcmd-install/2.setups-selector.sh
index c279d7085..e4c8e612d 100644
--- a/sdata/step/2.install-setups-selector.sh
+++ b/sdata/subcmd-install/2.setups-selector.sh
@@ -1,5 +1,6 @@
 # This script is meant to be sourced.
 # It's not for directly running.
+printf "${STY_CYAN}[$0]: 2. Setup for permissions/services etc\n${STY_RST}"
 
 # shellcheck shell=bash
 
diff --git a/sdata/step/3.install-files.sh b/sdata/subcmd-install/3.files.sh
similarity index 94%
rename from sdata/step/3.install-files.sh
rename to sdata/subcmd-install/3.files.sh
index eaea5017a..a9dc7c7e0 100644
--- a/sdata/step/3.install-files.sh
+++ b/sdata/subcmd-install/3.files.sh
@@ -1,5 +1,6 @@
 # This script is meant to be sourced.
 # It's not for directly running.
+printf "${STY_CYAN}[$0]: 3. Copying config files\n${STY_RST}"
 
 # shellcheck shell=bash
 
@@ -67,6 +68,15 @@ function ask_backup_configs(){
   if $backup;then
     backup_clashing_targets dots/.config $XDG_CONFIG_HOME "${BACKUP_DIR}/.config"
     backup_clashing_targets dots/.local/share $XDG_DATA_HOME "${BACKUP_DIR}/.local/share"
+    printf "${STY_BLUE}Backup into \"${BACKUP_DIR}\" finished.${STY_RST}\n"
+  fi
+}
+function auto_backup_configs(){
+  # Backup when $BACKUP_DIR does not exist
+  if [[ ! -d "$BACKUP_DIR" ]]; then
+    backup_clashing_targets dots/.config $XDG_CONFIG_HOME "${BACKUP_DIR}/.config"
+    backup_clashing_targets dots/.local/share $XDG_DATA_HOME "${BACKUP_DIR}/.local/share"
+    printf "${STY_BLUE}Backup into \"${BACKUP_DIR}\" finished.${STY_RST}\n"
   fi
 }
 
@@ -75,10 +85,12 @@ function ask_backup_configs(){
 # In case some dirs does not exists
 v mkdir -p $XDG_BIN_HOME $XDG_CACHE_HOME $XDG_CONFIG_HOME/quickshell $XDG_DATA_HOME
 
-case $ask in
-  false) sleep 0 ;;
-  *) ask_backup_configs ;;
-esac
+if [[ ! "${SKIP_BACKUP}" == true ]]; then
+  case $ask in
+    false) auto_backup_configs ;;
+    *) ask_backup_configs ;;
+  esac
+fi
 
 # TODO: A better method for users to choose their customization,
 # for example some users may prefer ZSH over FISH, and foot over kitty.
diff --git a/sdata/options/install.sh b/sdata/subcmd-install/options.sh
similarity index 92%
rename from sdata/options/install.sh
rename to sdata/subcmd-install/options.sh
index fa3f2b4e3..46a31d71f 100644
--- a/sdata/options/install.sh
+++ b/sdata/subcmd-install/options.sh
@@ -14,6 +14,7 @@ Options for install:
       --skip-allsetups      Skip the whole process setting up permissions/services etc
       --skip-allfiles       Skip the whole process copying configuration files
   -s, --skip-sysupdate      Skip system package upgrade e.g. \"sudo pacman -Syu\"
+      --skip-backup         Skip backup conflicting files
       --skip-quickshell     Skip installing the config for Quickshell
       --skip-hyprland       Skip installing the config for Hyprland
       --skip-fish           Skip installing the config for Fish
@@ -33,7 +34,7 @@ cleancache(){
 # `man getopt` to see more
 para=$(getopt \
   -o hfk:cs \
-  -l help,force,fontset:,clean,skip-allgreeting,skip-alldeps,skip-allsetups,skip-allfiles,skip-sysupdate,skip-quickshell,skip-fish,skip-hyprland,skip-plasmaintg,skip-miscconf,exp-files,via-nix \
+  -l help,force,fontset:,clean,skip-allgreeting,skip-alldeps,skip-allsetups,skip-allfiles,skip-sysupdate,skip-backup,skip-quickshell,skip-fish,skip-hyprland,skip-plasmaintg,skip-miscconf,exp-files,via-nix \
   -n "$0" -- "$@")
 [ $? != 0 ] && echo "$0: Error when getopt, please recheck parameters." && exit 1
 #####################################################################################
@@ -63,6 +64,7 @@ while true ; do
     --skip-allsetups) SKIP_ALLSETUPS=true;shift;;
     --skip-allfiles) SKIP_ALLFILES=true;shift;;
     -s|--skip-sysupdate) SKIP_SYSUPDATE=true;shift;;
+    --skip-backup) SKIP_BACKUP=true;shift;;
     --skip-hyprland) SKIP_HYPRLAND=true;shift;;
     --skip-fish) SKIP_FISH=true;shift;;
     --skip-quickshell) SKIP_QUICKSHELL=true;shift;;
diff --git a/setup b/setup
index 8fe456ff9..8e6b51d6d 100755
--- a/setup
+++ b/setup
@@ -34,75 +34,67 @@ case $1 in
   # Global help
   help|--help|-h)showhelp_global;exit;;
   # Correct subcommand
-  install|install-deps|install-setups|install-files|exp-uninstall|exp-update|exp-update-old)
-    SCRIPT_SUBCOMMAND=$1;shift;;
-  # No subcommand
-  -*|"")SCRIPT_SUBCOMMAND=install;;
+  install|exp-uninstall|exp-update|exp-update-old)
+    SUBCMD_NAME=$1
+    SUBCMD_DIR=./sdata/subcmd-$1
+    shift;;
+  # Correct subcommand but not using ./sdata/subcmd-$1
+  install-deps|install-setups|install-files)
+    SUBCMD_NAME=$1
+    SUBCMD_DIR=./sdata/subcmd-install
+    shift;;
+  # No subcommand, default to install
+  -*|"")
+    SUBCMD_NAME=install
+    SUBCMD_DIR=./sdata/subcmd-install
+    ;;
   # Wrong subcommand
   *)printf "${STY_RED}Unknown subcommand \"$1\".${STY_RST}\n";showhelp_global;exit 1;;
 esac
 #####################################################################################
-case ${SCRIPT_SUBCOMMAND} in
+if [[ -f "${SUBCMD_DIR}/options.sh" ]];
+  then source "${SUBCMD_DIR}/options.sh"
+fi
+case ${SUBCMD_NAME} in
   install)
-    source ./sdata/options/install.sh
     if [[ "${SKIP_ALLGREETING}" != true ]]; then
-      source ./sdata/step/0.install-greeting.sh
+      source ${SUBCMD_DIR}/0.greeting.sh
     fi
     if [[ "${SKIP_ALLDEPS}" != true ]]; then
-      printf "${STY_CYAN}[$0]: 1. Install dependencies\n${STY_RST}"
-      source ./sdata/step/1.install-deps-selector.sh
+      source ${SUBCMD_DIR}/1.deps-selector.sh
     fi
     if [[ "${SKIP_ALLSETUPS}" != true ]]; then
-      printf "${STY_CYAN}[$0]: 2. Setup for permissions/services etc\n${STY_RST}"
-      source ./sdata/step/2.install-setups-selector.sh
+      source ${SUBCMD_DIR}/2.setups-selector.sh
     fi
     if [[ "${SKIP_ALLFILES}" != true ]]; then
-      printf "${STY_CYAN}[$0]: 3. Copying config files\n${STY_RST}"
       if [[ "${EXPERIMENTAL_FILES_SCRIPT}" == true ]]; then
-        source ./sdata/step/3.install-files.experimental.sh
+        source ${SUBCMD_DIR}/3.files-exp.sh
       else
-        source ./sdata/step/3.install-files.sh
+        source ${SUBCMD_DIR}/3.files.sh
       fi
     fi
     ;;
   install-deps)
-    source ./sdata/options/install.sh
     if [[ "${SKIP_ALLDEPS}" != true ]]; then
-      printf "${STY_CYAN}[$0]: 1. Install dependencies\n${STY_RST}"
-      source ./sdata/step/1.install-deps-selector.sh
+      source ${SUBCMD_DIR}/1.deps-selector.sh
     fi
     ;;
   install-setups)
-    source ./sdata/options/install.sh
     if [[ "${SKIP_ALLSETUPS}" != true ]]; then
-      printf "${STY_CYAN}[$0]: 2. Setup for permissions/services etc\n${STY_RST}"
-      source ./sdata/step/2.install-setups-selector.sh
+      source ${SUBCMD_DIR}/2.setups-selector.sh
     fi
     ;;
   install-files)
-    source ./sdata/options/install.sh
     if [[ "${SKIP_ALLFILES}" != true ]]; then
-      printf "${STY_CYAN}[$0]: 3. Copying config files\n${STY_RST}"
       if [[ "${EXPERIMENTAL_FILES_SCRIPT}" == true ]]; then
-        source ./sdata/step/3.install-files.experimental.sh
+        source ${SUBCMD_DIR}/3.files-exp.sh
       else
-        source ./sdata/step/3.install-files.sh
+        source ${SUBCMD_DIR}/3.files.sh
       fi
     fi
     ;;
-  exp-uninstall)
-    source ./sdata/options/exp-uninstall.sh
-    source ./sdata/step/exp-uninstall.sh
-    exit
-    ;;
-  exp-update)
-    source ./sdata/options/exp-update.sh
-    source ./sdata/step/exp-update.sh
-    exit
-    ;;
-  exp-update-old)
-    source ./sdata/options/exp-update-old.sh
-    source ./sdata/step/exp-update-old.sh
+  exp-*)
+    source ${SUBCMD_DIR}/0.run.sh
     exit
     ;;
 esac