This Alfa is my personal favorite, it hasn't let me down in the 5+ years I have owned it.

This Panda is great if you want something more discreet.

If you go the usb way... I just got another one of these and it works as expected https://www.amazon.com/Panda-300Mbps-Wireless-USB-Adapter/dp/B00EQT0YK2

I think this should work

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https://www.amazon.com/Panda-300Mbps-Wireless-USB-Adapter/dp/B00EQT0YK2/ref=pd_lpo_147_t_0/130-4732357-3767034?_encoding=UTF8&pd_rd_i=B00EQT0YK2&pd_rd_r=f7c57eba-b3cd-47f8-888d-ff1aa6dd951d&pd_rd_w=oesm4&pd_rd_wg=NOtJG&pf_rd_p=7b36d496-f366-4631-94d3-61b87b52511b&pf_rd_r=RG0E6GVQKTHJ6BY8H1QS&psc=1&refRID=RG0E6GVQKTHJ6BY8H1QS

This is the one I opted for.

https://www.amazon.com/Panda-300Mbps-Wireless-USB-Adapter/dp/B00EQT0YK2

Buy this USB. It's tails compatible. And if u cant get a wifi connection buy this WiFi USB Adapter (also tails compatible). One you flash tails onto the USB, shut down ur comp, then turn back on & boot tails. Once you boot up, you'll see this image appear. Click on the + and create your persistent storage password. After that click start tails. Then go to

1. Choose Applications ▸ Tails ▸ Configure persistent volume.
2. Specify a passphrase of your choice in both the Passphrase and Verify Passphrase text boxes.
3. Click create and wait for it to finish.
4. The list of features of the Persistent Storage appears. Each feature corresponds to a set of files or settings that can be saved in the Persistent Storage. Turn on Personal Data for now, others can be turned on later according to your needs.
5. Click Save
6. Shut down ur computer and turn on with the USB stick, get to the boot menu where this screen appears.
7. In the Encrypted Persistent Storage section, enter your passphrase & click Unlock to unlock the Persistent Storage for the current working session.
8. Click Start Tails.
9. You can now go back & save your personal files, working documents & turn on any other feature you'd like to be persistent in the Persistent folder. To open the Persistent folder choose Places ▸ Persistent.
   

HAPPY TAILING!

There you have it. After following these steps you will be all set. Thats a complete walkthrough of what to do. If you have any other questions, I'll try my best to help, although with what I just provided, there shouldn't be a need for any questions what-so-ever.