If you’re a novice yourself or simply want to find out if you’re doing it correctly, these are the steps you need to follow for this process:

Step 1: Remove the SD card from your Android device
In order to avoid any problems, you actually need to unmount your card before removing it from its slot. Go to Settings > Storage and look for the Unmount SD card option, then tap on it.

A message will pop-up, warning you that some of the apps you are using may be unavailable until you remount the card. Tap OK. The card will unmount and you will see a notification saying “SD card safe to remove”. You can now proceed and remove it from its slot as well.

Step 2: Insert the SD card into your PC’s card reader
In a few moments, your PC will detect the microSD card and you can open it to transfer music. If your PC doesn’t have a reader, you can always buy an external one. Usually, it looks similar to a flash USB drive and you insert it in one of the PCs ports.

Step 3: Open the SD card’s directory and copy the desired music files
Basically, this is the step where you transfer music from a computer to an Android’s SD card. Copy all the files you want onto the microSD card, either by drag and drop or copy/paste. Wait until all files are transferred.

Note: Make sure you transfer only files that are compatible with your phone. Stick to MP3 or MP4, in most cases.

Step 4: Remove the SD card from your PC
Go to the PC’s system tray (those icons in the bottom right corner, alongside the clock) and click on the small white arrow. You should see the Safely Remove Hardware and Eject Media button. Click on it, in order to stop the microSD card, then remove it from the card reader.

It’s very important to stop the microSD card before removing it from your PC, as this makes sure that the transferring of the files was done correctly.

Step 5: Insert the SD card back in your phone
Remove the phone’s tray, using the special tool, if you have a phone with a tray for both the SIM and the microSD card. Put the card back in your phone and, using either your default music player app or the file explorer, check out the music files you just transferred.

https://www.unlockunit.com/blog/transfer-music-computer-androids-sd-card

What century were you born?

Nice information but how about you just transfer it to your phone directly,i do that all the time with my tecno spark and PC ,its way faster and easier.

Seriously? what happened to the USB port on the phone? or xender? or airdroid? or even Bluetooth?