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Input:
Question: How to shuffle songs in one folder of many on a card?  I go to the folder, and start it, and then shuffle, and always it goes to another folder!
Document: It has been a month and so far so good. The only interference so far has been between a shopping center and a light rail stop. On shuffle it does start at the beginning of the song that was playing unless you use bookmark to mark the time when the unit was shut off. I bookmarked the last second or two of a song and now when it starts it goes almost immediately to another song. We will see how it handles the summer heat in the southwest.
I'm not sure what determines the order on this player, but it works by different rules.Also...The device can be turned off with a button, but for some inexplicable reason, it always automatically turns itself back on and starts playing through the files the next time you start the car, whether or not you want to listen. If you don't think to turn it off again, you may find that it's played through the music you were last listening to and onward to another folder.
I have owned this device for almost two years and love most of the features and sound quality. The music from either the USB Drive or SD Card are very good except when driving in certain areas of the city or county. However, the one thing that drives me crazy is  the "shuffle" feature of the device which basically seems to get into a loop of playing the same songs and the same order whenever I turn off the car and start it later.
This product also provides the ability play music from media (SD card or USB flash drive). I give this functionality only 4 stars, as folder navigation is a little primitive and music does not always play in order. I have not yet figured out the patten or rationale behind this (and no, it is not on shuffle). However, I stick with my 5-star rating because it rocks at its primary purpose. By the way, shipping was quick and service excellent.
EDIT, UPDATE.I was contacted by Satechi and they offered to send a free replacement. Impressed, I accepted the offer and I received the replacement yesterday. It even came with a pre-paid shipping label should it not work again!Turns out it works great so far. I have about 450 songs in 1 folder and it does a good job at shuffle, unlike getting stuck in a shuffle pattern like many other electronic devices.
I consolidated all of my music onto the card from multiple sources and put the songs/audio files in related folders. I can step from Folder to folder or from song to song.I still have to figure out how to use the search feature and Bookmark feature for the digital audio books and lectures I listen to but the pause and fast forward features work well. I will update the review with more info/feedback as time goes on, but so far very happy with the product.
It should auto save the current position once every minute or two (on the SD card/USB).There is a bookmarking feature. It is kind of painful to use. Let us say you bookmark after listening 45 minutes into a lecture track. When you start the car next time, it starts from the bookmark whether you want it or not. Let us assume that is what you want. You continue listening from the bookmark, that track finishes, you skip to another folder/track and continue listening.
I used the suffle to change songs and even the volumn to a degree, although sometimes if the volumn is too high on the shuffle the sound is not as good on the stereo. I have not tired it with USB or SD card, I'm no expert and I'm not using all the features this transmitter comes with but I anticipate many years of fun and satisfaction from this transmitter.
This one does a great job. It clips occasionally when you have it on a frequency that isn't full static, but otherwise is awfully clear for coming through an FM channel- screen - plenty clear and able to adjust contrast. Shows freq, track name, artist, time left and folder- POWER BUTTON - I was amazed at how many other products did not have a power button. Also, i saw another poster said that it would turn on automatically when you turned your car on. Mine doesn't.
A month later the remote stopped working. Then it fell apart when pulling it out of the cigarette lighter (No I was not rough with it). I was able to get it back together, but this is when I really noticed it was put together poorly. Another month goes by and now you can't touch it while its on or it causes it to cut off and go static, then reloads the source.
Answer: while a song is playing, press menu/shuffle once, it will say repeat, press again and it will say normal, press again and it will say shuffle.  leave it there, do not touch for a minute.  it is now on shuffle mode. practice until you get it right. to test it, try this while a song is playing press the "play next button".