Unable to copy certain backed-up folders from PC to new microSD card
If your Windows ask you for admin permissions something is wrong - this should never happen as you just copied it from the other SD card. 

Anyway copying and SD card file by files is IMHO not a good idea because the Windows Explorer does usually hide certain files. 

Therefore I recommend to use a backup tool or alternatively use a compression program like 7Zip/WinZip/WinRAR and zip the whole source SD card to one file on your hard disk.

Then switch to the new SD-Card and restore the backup respectively decompress the created archive to the new SD card.

Edit: Note that a lot of SD cards on the market are "fake SD cards": Their controller has been manipulated to make the SD card look larger than it is (e.g. the card has 16GB flash memory but tells the Smartphone/PC it has 128GB). Writing to such a card will earlier or later end in a total disaster. Therefore I strongly recommend you to test any new SD card before using it. One of the best tools I know for doing so is a small Windows tool named h2testw (Language German and English). It writes files with a special pattern to the SD card until it is full and then reads it and tests if the pattern of every file is correct.