How to upload large file to the server using retrofit multipart

I have the request which works well in postman:

and I'm trying to make it with Retrofit. In general file sizes will be >500MB that. I did such uploading method:

fun uploadFile(file:File) {

        val client = OkHttpClient().newBuilder()
            .build()
        val mediaType: MediaType? = "text/plain".toMediaTypeOrNull()
        val body: RequestBody = MultipartBody.Builder().setType(MultipartBody.FORM)
            .addFormDataPart(
                "data", file.name,
                file.asRequestBody()
            )
            .build()
        val request: Request = Request.Builder()
            .url("https://..../upload.php")
            .method("POST", body)
            .build()
        val response: okhttp3.Response = client.newCall(request).execute()

       println(response.message)
    }

but I need to have file for uploading. I can create temporary file with such way:

val path = requireContext().cacheDir
val file = File.createTempFile(
    name ?: "",
    fileUri.lastPathSegment,
    path
)
val os = FileOutputStream(file)
os.write(string)
os.close()

but I usually receive outOfMemoryException. I also added to the AndroidManifest.xml heap param:

android:largeHeap="true"

but it didn't help me at all during temp file creating. I don't know how postman uploads files, but in general I managed to upload with his help file with size about 600Mb. I can also cut selected file with chunks:

val data = result.data
data?.let {
      val fileUri = data.data
      var name: String? = null
      var size: Long? = null
      fileUri.let { returnUri ->
            contentResolver?.query(returnUri!!, null, null, null, null)
      }?.use { cursor ->
            val nameIndex = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME)
            val sizeIndex = cursor.getColumnIndex(OpenableColumns.SIZE)

            cursor.moveToFirst()
            name = cursor.getString(nameIndex)
            size = cursor.getLong(sizeIndex)
       }


val inputStream: InputStream? = fileUri?.let { it1 ->
    contentResolver.openInputStream(
        it1
    )
}

val fileData = inputStream?.readBytes()
val mimeType = fileUri.let { returnUri ->
returnUri.let { retUri ->
    if (retUri != null) {
           contentResolver.getType(retUri)
    }
}
}


fileData?.let {
       val MAX_SUB_SIZE = 4194304 // 4*1024*1024 == 4MB
       var start = 0 // From 0
       var end = MAX_SUB_SIZE // To MAX_SUB_SIZE bytes
       var subData: ByteArray // 4MB Sized Array

       val max = fileData.size
       if (max > 0) {
           while (end < max) {
                subData = fileData.copyOfRange(start, end)
                start = end
                end += MAX_SUB_SIZE
                if (end >= max) {
                    end = max
                }
                                
                println("file handling" + subData.size)



        }
     end-- // To avoid a padded zero
     subData = fileData.copyOfRange(start, end)
     println("file handling" + subData.size)
     }
   }
}

all actions will be made in:

 private val filesReceiver =
        registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
            if (result.resultCode == Activity.RESULT_OK) {

             }
         }

so I won't have any file path in normal way. Anyway I think I did something wrong.

UPDATE

right now I have such file uploading from inputStream:

 private fun doSomeNetworkStuff(file:InputStream, name:String) {
        GlobalScope.launch(Dispatchers.IO) {
            val client = OkHttpClient()
                .newBuilder()
                .protocols(listOf(Protocol.HTTP_1_1))
                .connectTimeout(10, TimeUnit.MINUTES)
                .readTimeout(10, TimeUnit.MINUTES)
                .build()
            val mediaType: MediaType? = "text/plain".toMediaTypeOrNull()
            val body: RequestBody = MultipartBody.Builder().setType(MultipartBody.FORM)
                .addFormDataPart(
                    "data", name,
                    file.readBytes().toRequestBody(mediaType)
                )
                .build()
            val request: Request = Request.Builder()
                .url("https://.../upload.php")
                .method("POST", body)
                .build()

            val response: Response = client.newCall(request).execute()

            println(response.body)
        }
    }

and receive such error:

java.lang.OutOfMemoryError: Failed to allocate a 173410912 byte allocation with 25165824 free bytes and 89MB until OOM, max allowed footprint 199761800, growth limit 268435456

but I can upload with this code file with size about 90mb