Are you using the My Computer link shown when you plug the USB cable by any chance?
I'm getting the very same messages all over, it's annoying, and the conversion never succeeds anyway.
My Computer
At a glance
Windows 7 Ultimate x64Intel Core i7-740QM8 GB DDR3NVIDIA GeForce 330GT
Computer type
Laptop
Computer Manufacturer/Model Number
Toshiba Sattelite A665-S6092
OS
Windows 7 Ultimate x64
CPU
Intel Core i7-740QM
Memory
8 GB DDR3
Graphics Card(s)
NVIDIA GeForce 330GT
Screen Resolution
1366x768
Hard Drives
Samsung 840 SSD 500GB
1TB USB3 external HD
Cooling
Coolermaster Notepal U3 notebook cooling pad
Internet Speed
3mbps ASDL
Antivirus
ClamWin 0.98.7
Browser
Opera 12.17 x86 (main), Firefox 38 (sec), IE11 (last resort)
I never have this issue. Is it showing up as a media device or an actual drive?
My Computer
At a glance
Windows 10 ProAMD Ryzen 5 2400G Processor with Radeon RX Ve...G.SKILL Ripjaws V Series 16GB (2 x 8GB) 288-P...2047MB NVIDIA GeForce GTX 1060 6GB (EVGA)
I have tried both MTP and Camera setting on the tablet. When using MTP it wants to convert. When using camera it only shows pictures and copies only pictures.
This has me stumped. I don't believe there is a solution to this so I will just have to live with it.
Another much simpler option is to get the sd card and plug it into your pc with a usb to card reader. Easiest and fastest way. Or use something like google drive or onedrive.
My Computer
At a glance
Windows 10 ProAMD Ryzen 5 2400G Processor with Radeon RX Ve...G.SKILL Ripjaws V Series 16GB (2 x 8GB) 288-P...2047MB NVIDIA GeForce GTX 1060 6GB (EVGA)
Maybe it's not "easier" exactly, but I like to use ES File Explorer to manage my Android phone. It also works on tablets.
It can connect to Windows shares and read/write files from there. So you just put your files in a shared folder, and pick them up from the tablet. No conversions even asked, and don't even requires the USB cable. As it uses WiFi, it's somewhat slower on large files, though.
My Computer
At a glance
Windows 7 Ultimate x64Intel Core i7-740QM8 GB DDR3NVIDIA GeForce 330GT
Computer type
Laptop
Computer Manufacturer/Model Number
Toshiba Sattelite A665-S6092
OS
Windows 7 Ultimate x64
CPU
Intel Core i7-740QM
Memory
8 GB DDR3
Graphics Card(s)
NVIDIA GeForce 330GT
Screen Resolution
1366x768
Hard Drives
Samsung 840 SSD 500GB
1TB USB3 external HD
Cooling
Coolermaster Notepal U3 notebook cooling pad
Internet Speed
3mbps ASDL
Antivirus
ClamWin 0.98.7
Browser
Opera 12.17 x86 (main), Firefox 38 (sec), IE11 (last resort)