diff --git a/src/main/java/nsusbloader/Controllers/NSLRowModel.java b/src/main/java/nsusbloader/Controllers/NSLRowModel.java
index baa592e..0e7c9be 100644
--- a/src/main/java/nsusbloader/Controllers/NSLRowModel.java
+++ b/src/main/java/nsusbloader/Controllers/NSLRowModel.java
@@ -9,19 +9,14 @@ public class NSLRowModel {
     private String status;
     private File nspFile;
     private String nspFileName;
-    private String nspFileSize;
+    private long nspFileSize;
     private boolean markForUpload;
 
     NSLRowModel(File nspFile, boolean checkBoxValue){
         this.nspFile = nspFile;
         this.markForUpload = checkBoxValue;
         this.nspFileName = nspFile.getName();
-        if (nspFile.length()/1024.0/1024.0/1024.0 > 1)
-            this.nspFileSize = String.format("%.2f", nspFile.length()/1024.0/1024.0/1024.0)+" GB";
-        else if (nspFile.length()/1024.0/1024.0 > 1)
-            this.nspFileSize = String.format("%.2f", nspFile.length()/1024.0/1024.0)+" MB";
-        else
-            this.nspFileSize = String.format("%.2f", nspFile.length()/1024.0)+" kB";
+        this.nspFileSize = nspFile.length();
         this.status = "";
     }
     // Model methods start
@@ -31,7 +26,9 @@ public class NSLRowModel {
     public String getNspFileName(){
         return nspFileName;
     }
-    public String getNspFileSize() { return nspFileSize; }
+    public long getNspFileSize() {
+        return nspFileSize;
+    }
     public boolean isMarkForUpload() {
         return markForUpload;
     }
diff --git a/src/main/java/nsusbloader/Controllers/NSTableViewController.java b/src/main/java/nsusbloader/Controllers/NSTableViewController.java
index a0dbec3..fdcd415 100644
--- a/src/main/java/nsusbloader/Controllers/NSTableViewController.java
+++ b/src/main/java/nsusbloader/Controllers/NSTableViewController.java
@@ -53,7 +53,7 @@ public class NSTableViewController implements Initializable {
 
         TableColumn<NSLRowModel, String> statusColumn = new TableColumn<>(resourceBundle.getString("tab1_table_Lbl_Status"));
         TableColumn<NSLRowModel, String> fileNameColumn = new TableColumn<>(resourceBundle.getString("tab1_table_Lbl_FileName"));
-        TableColumn<NSLRowModel, String> fileSizeColumn = new TableColumn<>(resourceBundle.getString("tab1_table_Lbl_Size"));
+        TableColumn<NSLRowModel, Long> fileSizeColumn = new TableColumn<>(resourceBundle.getString("tab1_table_Lbl_Size"));
         TableColumn<NSLRowModel, Boolean> uploadColumn = new TableColumn<>(resourceBundle.getString("tab1_table_Lbl_Upload"));
 
         statusColumn.setEditable(false);
@@ -93,6 +93,16 @@ public class NSTableViewController implements Initializable {
         });
 
         uploadColumn.setCellFactory(paramFeatures -> new CheckBoxTableCell<>());
+        fileSizeColumn.setCellFactory(col -> new TableCell<NSLRowModel, Long>() {
+            @Override
+            protected void updateItem(Long length, boolean empty) {
+                if (length == null || empty) {
+                    setText("");
+                } else {
+                    setText(formatByteSize(length));
+                }
+            }
+        });
         table.setRowFactory(        // this shit is made to implement context menu. It's such a pain..
                 nslRowModelTableView -> {
                     final TableRow<NSLRowModel> row = new TableRow<>();
@@ -208,5 +218,15 @@ public class NSTableViewController implements Initializable {
             rowsObsLst.removeIf(current -> ! current.getNspFileName().toLowerCase().endsWith("nsp"));
         table.refresh();
     }
+    
+    
+    private String formatByteSize(double length) {
+        final String[] unitNames = { "bytes", "KiB", "MiB", "GiB", "TiB"};
+        int i;
+        for (i = 0; length > 1024 && i < unitNames.length - 1; i++) {
+            length = length / 1024;
+        }
+      return String.format("%,.2f %s", length, unitNames[i]);
+    }
 
 }
\ No newline at end of file