diff --git a/include/Common.h b/include/Common.h
index abf758a..313df2b 100644
--- a/include/Common.h
+++ b/include/Common.h
@@ -135,8 +135,9 @@ std::string ThreadName(bool DebugModeOverride = false);
 void RegisterThread(const std::string& str);
 #define RegisterThreadAuto() RegisterThread(__func__)
 
-#define KB 1024
-#define MB (KB * 1024)
+#define KB 1024llu
+#define MB (KB * 1024llu)
+#define GB (MB * 1024llu)
 #define SSU_UNRAW SECRET_SENTRY_URL
 
 #define _file_basename std::filesystem::path(__FILE__).filename().string()
diff --git a/include/TNetwork.h b/include/TNetwork.h
index 528aef4..87e4235 100644
--- a/include/TNetwork.h
+++ b/include/TNetwork.h
@@ -48,4 +48,5 @@ private:
     void SendFile(TClient& c, const std::string& Name);
     static bool TCPSendRaw(TClient& C, SOCKET socket, char* Data, int32_t Size);
     static void SplitLoad(TClient& c, size_t Sent, size_t Size, bool D, const std::string& Name);
+    static uint8_t* SendSplit(TClient& c, SOCKET Socket, uint8_t* DataPtr, size_t Size);
 };
diff --git a/src/TNetwork.cpp b/src/TNetwork.cpp
index dfa8776..9c0e748 100644
--- a/src/TNetwork.cpp
+++ b/src/TNetwork.cpp
@@ -761,14 +761,63 @@ void TNetwork::SendFile(TClient& c, const std::string& UnsafeName) {
     }
 }
 
+static std::pair<size_t /* count */, size_t /* last chunk */> SplitIntoChunks(size_t FullSize, size_t ChunkSize) {
+    if (FullSize < ChunkSize) {
+        return { 0, FullSize };
+    }
+    size_t Count = FullSize / (FullSize / ChunkSize);
+    size_t LastChunkSize = FullSize - (Count * ChunkSize);
+    return { Count, LastChunkSize };
+}
+
+TEST_CASE("SplitIntoChunks") {
+    size_t FullSize;
+    size_t ChunkSize;
+    SUBCASE("Normal case") {
+        FullSize = 1234567;
+        ChunkSize = 1234;
+    }
+    SUBCASE("Zero original size") {
+        FullSize = 0;
+        ChunkSize = 100;
+    }
+    SUBCASE("Equal full size and chunk size") {
+        FullSize = 125;
+        ChunkSize = 125;
+    }
+    SUBCASE("Even split") {
+        FullSize = 10000;
+        ChunkSize = 100;
+    }
+    SUBCASE("Odd split") {
+        FullSize = 13;
+        ChunkSize = 2;
+    }
+    SUBCASE("Large sizes") {
+        FullSize = 10 * GB;
+        ChunkSize = 125 * MB;
+    }
+    auto [Count, LastSize] = SplitIntoChunks(FullSize, ChunkSize);
+    CHECK((Count * ChunkSize) + LastSize == FullSize);
+}
+
+uint8_t* /* end ptr */ TNetwork::SendSplit(TClient& c, SOCKET Socket, uint8_t* DataPtr, size_t Size) {
+    if (TCPSendRaw(c, Socket, reinterpret_cast<char*>(DataPtr), Size)) {
+        return DataPtr + Size;
+    } else {
+        return nullptr;
+    }
+}
+
 void TNetwork::SplitLoad(TClient& c, size_t Sent, size_t Size, bool D, const std::string& Name) {
     std::ifstream f(Name.c_str(), std::ios::binary);
+    auto Buf = f.rdbuf();
     uint32_t Split = 125 * MB;
-    char* Data;
+    std::vector<uint8_t> Data;
     if (Size > Split)
-        Data = new char[Split];
+        Data.resize(Split);
     else
-        Data = new char[Size];
+        Data.resize(Size);
     SOCKET TCPSock;
     if (D)
         TCPSock = c.GetDownSock();
@@ -779,8 +828,8 @@ void TNetwork::SplitLoad(TClient& c, size_t Sent, size_t Size, bool D, const std
         size_t Diff = Size - Sent;
         if (Diff > Split) {
             f.seekg(Sent, std::ios_base::beg);
-            f.read(Data, Split);
-            if (!TCPSendRaw(c, TCPSock, Data, Split)) {
+            f.read(reinterpret_cast<char*>(Data.data()), Split);
+            if (!TCPSendRaw(c, TCPSock, reinterpret_cast<char*>(Data.data()), Split)) {
                 if (c.GetStatus() > -1)
                     c.SetStatus(-1);
                 break;
@@ -788,8 +837,8 @@ void TNetwork::SplitLoad(TClient& c, size_t Sent, size_t Size, bool D, const std
             Sent += Split;
         } else {
             f.seekg(Sent, std::ios_base::beg);
-            f.read(Data, Diff);
-            if (!TCPSendRaw(c, TCPSock, Data, int32_t(Diff))) {
+            f.read(reinterpret_cast<char*>(Data.data()), Diff);
+            if (!TCPSendRaw(c, TCPSock, reinterpret_cast<char*>(Data.data()), int32_t(Diff))) {
                 if (c.GetStatus() > -1)
                     c.SetStatus(-1);
                 break;
@@ -797,8 +846,6 @@ void TNetwork::SplitLoad(TClient& c, size_t Sent, size_t Size, bool D, const std
             Sent += Diff;
         }
     }
-    delete[] Data;
-    f.close();
 }
 
 bool TNetwork::TCPSendRaw(TClient& C, SOCKET socket, char* Data, int32_t Size) {