There is not enough space on the disk when create file by using csharp

I work on asp.net core api with .net core 2.2

but i get error

ex = {System.IO.IOException: There is not enough space on the disk : '\\192.168.2.7\ImportExport\testImporter\5\orignal-920e7c47-c345-4c40-86ac-6ecb9dde8e6c.xlsx\orignal-920e7c47-c345-4c40-86ac-6ecb9dde8e6c.xlsx'

at System.IO.FileStream.WriteCore(ReadOnlySpa..

var filedata = ContentDispositionHeaderValue.Parse(Request.Form.Files[0].ContentDisposition).FileName.Trim('"');
var dbPath = Path.Combine(DirectoryCreate, fileName);
using (var stream = new FileStream(dbPath, FileMode.Create))
{
Request.Form.Files[0].CopyTo(stream);
stream.Flush();
stream.Close();
}

exception done on red line

so why this error happen

and how to avoid it

so how to solve issue please ?

dbpath variable as below

\\192.168.2.7\ImportExport\testImporter\5\orignal-85d31d98-8e98-427b-9c61-fce191f002b8.xlsx\orignal-85d31d98-8e98-427b-9c61-fce191f002b8.xlsx