diff --git a/core-buffer/include/BufferUtils.hpp b/core-buffer/include/BufferUtils.hpp
index fb8063a..57017b6 100644
--- a/core-buffer/include/BufferUtils.hpp
+++ b/core-buffer/include/BufferUtils.hpp
@@ -6,10 +6,29 @@
 
 namespace BufferUtils
 {
+    const size_t STREAM_BLOCK_SIZE = 100;
     extern const size_t FILE_MOD;
     extern const size_t FOLDER_MOD;
     extern const std::string FILE_EXTENSION;
 
+    #pragma pack(push)
+    #pragma pack(1)
+    struct FileBufferMetadata {
+        // Needed by RingBuffer
+        const uint64_t frame_bytes_size = 2*512*1024*STREAM_BLOCK_SIZE;
+        uint64_t buffer_slot_index;
+
+        uint64_t start_pulse_id;
+        uint64_t stop_pulse_id;
+        uint16_t module_id;
+
+        uint64_t pulse_id[STREAM_BLOCK_SIZE];
+        uint64_t frame_index[STREAM_BLOCK_SIZE];
+        uint32_t daq_rec[STREAM_BLOCK_SIZE];
+        uint16_t n_received_packets[STREAM_BLOCK_SIZE];
+    };
+    #pragma pack(pop)
+
     std::string get_filename(
             std::string root_folder,
             std::string device_name,
diff --git a/core-writer/include/RingBuffer.hpp b/core-writer/include/RingBuffer.hpp
index e2829f0..38c9442 100644
--- a/core-writer/include/RingBuffer.hpp
+++ b/core-writer/include/RingBuffer.hpp
@@ -12,24 +12,6 @@
 #include <chrono>
 #include "date.h"
 
-#pragma pack(push)
-#pragma pack(1)
-struct FileBufferMetadata {
-    // Needed by RingBuffer
-    const uint64_t frame_bytes_size = 2*512*1024*50;
-    uint64_t buffer_slot_index;
-
-    uint64_t start_pulse_id;
-    uint64_t stop_pulse_id;
-    uint16_t module_id;
-
-    uint64_t pulse_id[50];
-    uint64_t frame_index[50];
-    uint32_t daq_rec[50];
-    uint16_t n_received_packets[50];
-};
-#pragma pack(pop)
-
 struct FrameMetadata
 {
     // Ring buffer needed data.