diff --git a/postgres_backup.sh b/postgres_backup.sh
index baa7356..eb4f642 100755
--- a/postgres_backup.sh
+++ b/postgres_backup.sh
@@ -16,6 +16,10 @@
 ####################################
 #
 # Load config file:
+if [ ! -f ${HOME}/.postgres_backup.conf ]; then
+	echo "ERROR 10: Configuration file not found"
+	exit 10
+fi
 source ${HOME}/.postgres_backup.conf
 
 
@@ -28,12 +32,82 @@ else
 	DIR=${DIR}/manual
 fi
 
-## Define message command
+## Define message commands
 msg_show() {
 	[ "$AUTO" = "false" ] && printf "$1"
 }
+msg_check() {
+	[ "$AUTO" = "false" ] && printf '%-70s %s' "$1" # | sed s/\ \ /../g
+}
+get_size() {
+	tsize=$(find $1 -prune -printf '%s\n')
+	[ $tsize -lt 1024 ] && tsize="$tsize B" || tsize=$(numfmt --to=iec-i --suffix=B --format='%.3f' <<<$tsize | sed -r 's/([A-Z])/ \1/')
+	printf "$tsize"
+}
+
+## Sanity check
+pass="$(tput bold)$(tput setaf 2)OK$(tput sgr0)\n"
+fail="$(tput bold)$(tput setaf 1)FAIL$(tput sgr0)\n"
+
+msg_show "=== $(tput bold)Config Sanity Check$(tput sgr0)\n"
+
+msg_check "PostgreSQL server port: $(tput bold)${PORT}$(tput sgr0)"
+if [ $PORT -lt 65536 -a $PORT -gt 0 ] 2>/dev/null; then
+	msg_show "$pass"
+else
+	msg_show "$fail"
+	echo "ERROR 11: PORT configuration not a valid port number" >&2
+	exit 11
+fi
+msg_check "Backup directory: $(tput bold)${DIR}$(tput sgr0)"
+if [ -d "$DIR" ]; then
+	msg_show "$pass"
+else
+	msg_show "$fail"
+	echo "ERROR 12: Backup directory does not exist" >&2
+	exit 12
+fi
+msg_check "Compression type: $(tput bold)${COMPRESSION}$(tput sgr0)"
+case $COMPRESSION in
+	xz)
+		msg_show "$pass"
+		msg_check "Compression level: $(tput bold)${COMP_LEVEL}$(tput sgr0)"
+		if [ $(sed s/e// <<< $COMP_LEVEL) -lt 10 -a $(sed s/e// <<< $COMP_LEVEL) -gt 0 ] 2>/dev/null; then
+			msg_show "$pass"
+		else
+			msg_show "$fail"
+			echo "ERROR 14: Compression level not valid" >&2
+			exit 14
+		fi
+		;;
+	zstd)
+		msg_show "$pass"
+		msg_check "Compression level: $(tput bold)${COMP_LEVEL}$(tput sgr0)"
+		if [ $COMP_LEVEL -lt 20 -a $COMP_LEVEL -gt 0 ] 2>/dev/null; then
+			msg_show "$pass"
+		else
+			msg_show "$fail"
+			echo "ERROR 14: Compression level not valid" >&2
+			exit 14
+		fi
+		;;
+	*)
+		msg_show "$fail"
+		echo "ERROR 13: Compression not configured correctly" >&2
+		exit 13
+		;;
+esac
+msg_check "Thread count: $(tput bold)${THREADS}$(tput sgr0)"
+if [ $THREADS -eq $THREADS -a $THREADS -gt -1 ] 2>/dev/null; then
+	msg_show "$pass"
+	[ $THREADS -gt $(nproc) ] 2>/dev/null && msg_show "$(tput setaf 3)$(tput bold)WARN:$(tput sgr0) THREADS is set higher than CPU count!\n"
+else
+	msg_show "$fail"
+	echo "ERROR 15: Thread count is not a valid positive integer" >&2
+	exit 15
+fi
+## End sanity check
 
-msg_show "Backup directory set to $(tput bold)${DIR}$(tput sgr0)\n"
 
 ## Set date for timestamp
 DATE=$(date +%Y%m%d-%H%M)
@@ -42,33 +116,33 @@ msg_show "Timestamp set to $(tput bold)${DATE}$(tput sgr0)\n"
 ## Get list of DBs
 list_db=$(psql -p${PORT} -U postgres -t -c 'select datname from pg_database;' | grep -v 'template0\|template1\|postgres' | sed '/^$/d')
 
+## Set compression parameters
 case $COMPRESSION in
 	xz)
 		compress="xz -T${THREADS} -${COMP_LEVEL} -"
 		comp_ext="xz"
-		msg_show "Compression set to $(tput bold)${COMPRESSION}$(tput sgr0)\n"
 		;;
 	zstd)
 		compress="zstd -T${THREADS} -${COMP_LEVEL} -z -"
 		comp_ext="zst"
-		msg_show "Compression set to $(tput bold)${COMPRESSION}$(tput sgr0)\n"
 		;;
 	*)
-		echo "ERROR 11: Compression not configured correctly!" >&2
-		exit 11
+		echo "ERROR 13: Compression not configured correctly!" >&2
+		exit 13
 		;;
 esac
 
 msg_show "\nStarting backup procedures...\n\n"
 
 ## Backup globals
+target="${DIR}/globals_${DATE}.dmp.${comp_ext}"
 pg_dumpall -p${PORT} -g | eval $compress > ${DIR}/globals_${DATE}.dmp.${comp_ext}
-msg_show "Backed up $(tput setaf 2)$(tput bold)globals$(tput sgr0) as $(tput setaf 3)${DIR}/globals_${DATE}.dmp.${comp_ext}$(tput sgr0) using $(tput bold)${compress}$(tput sgr0)\n"
+msg_show "Backed up $(tput setaf 2)$(tput bold)globals$(tput sgr0) as $(tput setaf 3)${target}$(tput sgr0) [$(tput setaf 2)$(get_size $target)$(tput sgr0)] using $(tput bold)${compress}$(tput sgr0)\n"
 
 for db in $list_db; do
 	target="${DIR}/${db}_${DATE}.dmp.${comp_ext}"
 	pg_dump -O $db | eval $compress > $target
-	msg_show "Backed up $(tput setaf 2)$(tput bold)${db}$(tput sgr0) as $(tput setaf 3)${target}$(tput sgr0) using $(tput bold)${compress}$(tput sgr0)\n"
+	msg_show "Backed up $(tput setaf 2)$(tput bold)${db}$(tput sgr0) as $(tput setaf 3)${target}$(tput sgr0) [$(tput setaf 2)$(get_size $target)$(tput sgr0)] using $(tput bold)${compress}$(tput sgr0)\n"
 done
 
 exit 0