diff --git a/src/saving.go b/src/saving.go
new file mode 100644
index 0000000..261d8d3
--- /dev/null
+++ b/src/saving.go
@@ -0,0 +1,57 @@
+// saving.go
+package main
+
+import (
+	"encoding/csv"
+	"log"
+	"os"
+	"sort"
+	"strconv"
+)
+
+func SaveToCsvFile(data []StatForTime, keymap map[uint8]string, path string, isOnlySum bool) {
+
+	numKeysInt := make([]int, 0)
+	for key := range keymap {
+		numKeysInt = append(numKeysInt, int(key))
+	}
+	sort.Ints(numKeysInt)
+	numKeys := make([]uint8, 0)
+	for _, key := range numKeysInt {
+		numKeys = append(numKeys, uint8(key))
+	}
+
+	titleLine := make([]string, 0)
+	titleLine = append(titleLine, "Time")
+	if !isOnlySum {
+		for _, key := range numKeys {
+			titleLine = append(titleLine, keymap[key])
+		}
+	}
+	titleLine = append(titleLine, "Sum")
+
+	table := make([][]string, 0)
+	table = append(table, titleLine)
+	for _, rec := range data {
+		line := make([]string, 0)
+		line = append(line, strconv.Itoa(int(rec.time)))
+		var sum int
+		for _, key := range numKeys {
+			sum += rec.keys[key]
+			if !isOnlySum {
+				line = append(line, strconv.Itoa(rec.keys[key]))
+			}
+		}
+		line = append(line, strconv.Itoa(sum))
+		table = append(table, line)
+	}
+
+	csvfile, err := os.Create(path)
+	if err != nil {
+		log.Fatal(err)
+		return
+	}
+	defer csvfile.Close()
+	writer := csv.NewWriter(csvfile)
+	writer.WriteAll(table)
+}