Chunk size set to 1MB for now, as it seems that our networking code has problems when transferring 2MB chunks. We can increase this later once that problem has been fixed.

src/main/java/org/qortal/storage/DataFile.java

@@ -44,7 +44,7 @@ public class DataFile {
     private static final Logger LOGGER = LogManager.getLogger(DataFile.class);
 
     public static final long MAX_FILE_SIZE = 100 * 1024 * 1024; // 100MiB
-    public static final int CHUNK_SIZE = 2 * 1024 * 1024; // 2MiB
+    public static final int CHUNK_SIZE = 1 * 1024 * 1024; // 1MiB
     public static int SHORT_DIGEST_LENGTH = 8;
 
     protected String filePath;