YOu need a file manager to move things. Its basically like opening a folder on a computer to move stuff from desktop to usb drives etc. I recommend ASTRO file manager. ES file manager pops up ads even when you arent using it. After you install that, open it up and there should be a guide telling you how to use it, If not, read the description of the app in playstore.
Turn off the tab, then press power + vol up + home all together until it turns on. You should see some text in the corner that says "RECOVERY MODE" If the tablet goes into recovery mode, then the home button is working, its just the software. You can factory reset the tablet in settings.
If you have 4.4 and lower, you can move apps to sdcard by going into settings > apps > slide right until you get to "SD Card". Unchecked apps mean that the app isn't on your SD card so check them. If you have 6.0 and higher, you can choose to treat the sd card as internal storage (not sure where that is). Downsides to having apps on sd cards: The app will no longer be available when the sd card is removed (until you reinsert it) apps run slower on sd cards
This is the phone with the buttons on the back right? If the device can be turned on, then press all three buttons (power and vol up + down) simultaneously until android recovery pops up. Select wipe data and choose yes. This usually wont delete pictures, downloads, or anything on sdcard0, but will reset the phone.
You need to install the drivers for your speakers. Drivers tel your computer what hardware on your pc does and how it operates. So if your pc doesnt know how to use the speakers, it wont work so search in google "Toshiba Satellite U300 speaker drivers" and you should get links to it. hint dont download automatic drivers scan tools they are viruses.
Heres a trick that wont delete your pictures/videos and anything stored in sdcard0: Turn off your device. hold the volume up button, home button, and power button until you get to a android recovery screen. use the volume buttons to navigate to wipe data dont worry it will only delete apps not your pictures or videos and music and stuff after the phone restarts, you can check in a file manager (you can search for one on the appstore) you will have your pictures/videos/music there hope this helps also you can purposly "disable" your device for 30 secs and use your google account to unlock it.