Showing internetconnection Error[21000] howto fix it

Yes, you need Sonic Stage software installed in PC to transfer mp3 files in this Sony MP3 Player.
Click Sony Support, select OS running in PC in drop down list to download Sonic Stage software, install it in PC then connect mp3 player with PC and transfer files through Sonic Stage.
Thanks.

I hope you have Sonic Stage software installed in your computer to transfer mp3 files in this mp3 player.
Plug mp3 player in computer and Sonic Stage software and transfer few mp3 files in mp3 player. software will take care of that error as well and will install required files/ folders in mp3 player automatically.

Install Sonic Stage software cd in computer or click Sony Support to download Sonic Stage software by selecting OS in drop down list.
After installation, plug MP3 player in computer and transfer mp3 files in player, Sonic Stage will take care of no data format problem as well.

No problem,
Install Sonic Stage software in your PC, hook your Sony NW-E305 and it will be fixed by transferring music files.
Click Sony Support, if you want to download Sonic Stage software.
Hope this info will solve your problem.
Thanks.

if u have a installer cd with the device then
please install the driver then plug your device
in the connectivity cable.
it will synchronized with you pc and show a drive in my computer.
send your files to this drive and to end the session unplug your device

ive got the new version of the sony sonic stage downloaded onto my laptop,and when i plug my player into my laptop via usb cable,the player itself is recognized straight away as a harddrive/removable disk etc,and you have to transfrer music onto the player as from sonic stage music library,and you also have to creatate you own music library via sonic stage,and u can also transfer music from your own music library wich you use via windows media player,and also u can transfer a cd into you sony sonic stage music libraty,and this is similar to when your using the windows media player as to rip a cd or transfer music onto an mp3 player,as i use all diffrent types of mp3 players myself,and i find the archos gmini sx 202 player to be pretty awesome player,as ive got to of them as well,and i use windows media player as to transfer music files onto them,and i cannot transfer any music files onto the sony ones via windown media player as those music file wont show up on the player at all,and ive tried this myself,and it will only work via sony sonic stage.

I don't know if this will help but have you tried Sony's website? There is a security update for Sonic Stage 4.3 that they say must be installed in order to make the program run properly. Go to Sony USA and type in minidisc players in the search window. Then click on the link for minidisc players. When that window opens type in your model number and the page displaying that particular model should open. There you should find the latest software updates. I downloaded Sonic Stage 4.3 along with all of the needed updates from Sony's site and it works just fine for me. You may have to uninstall your current software and reinstall it after installing the security update as the installation instructions on the website said that the installation must be done in that order or the Sonic Stage software may not work properly. Sony also offers email tech support.
Good luck.

get rid of mp3 player sony old out date sonic stage has too many format probelms to begin with.

had same problem, but it's easy to solve. When you use vista and sonicstage 4.3 (vista version)
the only thing you have to do is to go to the propertiesscreen en turn off the compatabilitymodus with xp en it will run fine.

According to the Sony website the connect player won't run under Vista. They suggest downloading their Sonic Stage software instead but according to the spec that won't show the current track playing.