Question Best Way to receive AssetBundle Files through TcpClient

I want to receive AssetBundle files during runtime, so I do it asynchronously
with NetworkStream.ReadAsync ( buffer, 0, bytesToRead);


1
I want to receive an AssetBundle file of 1 MB.
Would it be better to have a buffer of say 8 KB, receive that and save it to the
big FinalByteArray which has size 1 MB or directly receive to FinalByteArray
like that NetworkStream.ReadAsync ( FinalByteArray, 0, bytesToRead);

2
Also, I will use AssetBundle.LoadFromMemoryAsync(FinalByteArray);
which means the 'AssetBundle.LoadFromMemoryAsync' method will take the WHOLE 1 MB array.
I did not find anywhere specifications on
how big of a byteArray 'AssetBundle.LoadFromMemoryAsync' method can handle.
In Unity3d docs, it has one example on which 'AssetBundle.LoadFromMemoryAsync' method takes 1 KB byteArray.

 

AssetBundle.LoadFromMemoryAsync it is limited only by the available RAM, but I saw somewhere that people complained about bundles larger than 4 GB (either they did not load or they loaded but with errors)