Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: how to create categories of music on sd card?
Document: bought this when going to the beach cabin with friends, able to listen to music both bluetooth and sd card, battery good, easy to operate,
The sharrk portable bluetooth  mini speaker is a good speaker but when I insert a sd card to play music it will skip while playing
I love this speaker sounds great does everything as advertised.Connects to blue tooth no problem.Love that it uses a micro sd card. I can pack tons of music in a compact unit..
The sound quality was great as well. The music came through clear and crisp. The speaker has a deep base and tremble but not too distorted. Overall this little speaker exceeded our expectations. The battery life was great for us. We were out doing yard work for about 4 hours and the speaker still had a decent amount of power left. We have not tried the using the micro sd card slot yet. We primary bought this for syncing with our tablets.
I can keep the Touch in my pocket to prevent its theft, yet keep myself and potential customers musically entertained.Setup was super-easy and quick, volume plus and minus controls were no brainers, although I haven't yet tried either music from an SD card or using the Aux feature. Bass is excellent and the sound didn't distort even if I pushed the volume to its highest level.One caveat: this little baby is quite heavy for its size, probably because of the magnet that helps create that great sound.
awesome, very loud, no volume control when using sd card, bluetooth works well. works good on external cd player too
This little device is awesome. Great mono sound from a tiny speaker. Very pleased with purchase. I have only used the speaker with the micro sd card.
Pros: aesthetics, sound, Bluetooth, sd card, audio in featuresCons: Once Bluetooth is connected, I followed the instructions to turn Bluetooth off while the speaker was still on but Bluetooth would not turn off, I have to turn off and on the speaker to get it to play by audio cable
Don't let the small size fool you. This little speaker has a really big sound. I use it for my TuneIn Radio app and my IHeart app. It can also be used as a speaker phone, and has a slot for a mini sd card. I liked it so much I bought another for a gift.
The ideal solution!.Her only issue is as she states that the volume goes down with the charge when working off of the rechargeable battery, I just used it plugged in to the charger, and was really impressed at both the volume and the quality of the sound that comes out of this small speaker with just an sd card plugged in. This is an ideal little desk stereo for someone like me, and my friend is very happy with it.
Answer: It just plays all music in order, no categories unfortunately