Thanks for the reply @Lillian if you don't mind I have some other doubts
1- If both PC and mobile are connected to the same router, when airdroid transfer data...Does it uses the internet or the locar net? (As far as I understtood from your reply, just the local web
2-To connect both devices when they are connected to the same router. It is just as simple as having a shortcut of "web.airdroid.com" to connect trough the local net or do I have to type de IP (kind of http://192.168.0.1XX.8888) if ip changes frecuently it is quite annoying to type everytime you connect your device
3- Thanks for showing the promotion. Can you post the place to join the promo? I google that promo and it seems it is jus for the first 2 months isnt it? And as I can see the free airdroid version is limited to 200 MB total size and 30 MB file size Am I rigth? How often this limited is refreshed? montly?
Thanks again for your great help, many info I found was obsolete or confussing, now it is much clearer to me,
Thanx Lillian!
Hi, Sorry for the late reply.
1. When in LAN (same WiFi), the transferred data (files, pics, videos, etc) use the local network, and not getting thru the internet outside. Therefore please select the trusted network

2. Kindly note that Lite mode requires enter the IP address everytime you log in web.airdroid.com for security concerns. The IP address changes due to the networks change. If the phone connects to the same WiFi, the IP address is relatively stable and does not change often.And you can also choose to log in with account and PW on web.airdroid.com in which you can choose "stay signed in for 2 weeks".
3. As for the promotion, pls check this post and see if it helps:
http://forums.airdroid.com/viewtopic.php?f=4&t=15881 And for free account, the remote data quota is 200MB, including file transfer, receiving and replying desktop notification, and AirMirror in remote connection. If it is LAN connection mode, it does not cost the 200MB remote data. Pls check this post for info about LAN and remote connection mode:
http://forums.airdroid.com/viewtopic.php?f=4&t=15944 As for 30MB, it means that if it is remote connection mode, free account can only transfer a file with maximum of 30MB once.
And yes it refreshes every month since the date you sign up the account.