Downloading to CC error message - HELP

I have 8,664 books to move via Calibre and Calibre Companion from my computer to my Samsung SM-T280 and to its 64 gigabyte SDCard, as the 8 gigabytes in the actual tablet do not have enough available space to accept that many ebooks. I have just moved 24 books to that SDCard using the two programs and it took over a half an hour because I kept getting the following error message, and each time need to tell CC to connect to Calibre again, and then pick up wherever it stopped. HELP... What do I need to do to stop this error from occurring over and over... Running latest version of Windows 10 on the computer, and the Tablet is as it comes when it comes to the OS. The error seems to be coming from the Computer...


[Errno 10053] An established connection was aborted by the software in your host machine

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 88, in run
File "site-packages\calibre\gui2\device.py", line 587, in _upload_books
File "site-packages\calibre\devices\smart_device_app\driver.p y", line 51, in _synchronizer
File "site-packages\calibre\devices\smart_device_app\driver.p y", line 1454, in upload_books
File "site-packages\calibre\devices\smart_device_app\driver.p y", line 691, in _put_file
File "site-packages\calibre\devices\smart_device_app\driver.p y", line 577, in _send_byte_string
error: [Errno 10053] An established connection was aborted by the software in your host machine

retzofrex@gmail.com