diff --git a/services/backup/docker-server/contents/server/src/Constants.h b/services/backup/docker-server/contents/server/src/Constants.h
new file mode 100644
--- /dev/null
+++ b/services/backup/docker-server/contents/server/src/Constants.h
@@ -0,0 +1,26 @@
+#pragma once
+
+#include <string>
+
+namespace comm {
+namespace network {
+
+// 4MB limit
+// WARNING: use keeping in mind that grpc adds its own headers to messages
+// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md
+// so the message that actually is being sent over the network looks like this
+// [Compressed-Flag] [Message-Length] [Message]
+//    [Compressed-Flag]   1 byte  - added by grpc
+//    [Message-Length]    4 bytes - added by grpc
+//    [Message]           N bytes - actual data
+// so for every message we get 5 additional bytes of data
+// as mentioned here
+// https://github.com/grpc/grpc/issues/15734#issuecomment-396962671
+// grpc stream may contain more than one message
+const size_t GRPC_CHUNK_SIZE_LIMIT = 4 * 1024 * 1024;
+const size_t GRPC_METADATA_SIZE_PER_MESSAGE = 5;
+
+const std::string AWS_REGION = "us-east-2";
+
+} // namespace network
+} // namespace comm
diff --git a/services/backup/docker-server/contents/server/src/Tools.h b/services/backup/docker-server/contents/server/src/Tools.h
deleted file mode 100644
--- a/services/backup/docker-server/contents/server/src/Tools.h
+++ /dev/null
@@ -1,26 +0,0 @@
-#pragma once
-
-namespace comm {
-namespace network {
-
-// 4MB limit
-const size_t GRPC_CHUNK_SIZE_LIMIT = 4 * 1024 * 1024;
-
-// 5MB limit
-const size_t AWS_MULTIPART_UPLOAD_MINIMUM_CHUNK_SIZE = 5 * 1024 * 1024;
-
-enum class OBJECT_TYPE {
-  ENCRYPTED_BACKUP_KEY = 0,
-  TRANSACTION_LOGS = 1,
-  COMPACTION = 2,
-};
-
-class invalid_argument_error : public std::runtime_error {
-public:
-  invalid_argument_error(std::string errorMessage)
-      : std::runtime_error(errorMessage) {
-  }
-};
-
-} // namespace network
-} // namespace comm