Well, yes there is a grace period but it's not 30 days, it's 20 days.
You need to find out what's using your data. Search these forums. One of the other members has a step-by-step on how to diagnose data loss. There can be many ways to have it drain off:
Data Usage Sources – Common and Not So Common If you’re wondering how your data seems to be used up so quickly before your data reset, please keep in mind there are many factors to consider while trying to narrow down the cause(s). Here is a list of factors to check when questioning your usage. This is not an exhaustive list, but common things all Internet users experience.
- more devices are capable of connecting to the internet: phones, tablets, gaming consoles, SmartTVs, and even refrigerators can connect wirelessly to the internet. Keep track of what devices you leave running on Wi-Fi.
- automatic-updates: your computer and any other programs you use will often keep working in the background, even if you're not actively using that program, in order to keep your system/program up-to-date. Anti-virus programs will periodically use your internet connection to check back with their malware database for any updates. You should have an option to turn off auto-updates and/or schedule them for a later time.
- multimedia content: Netflix, Hulu, YouTube, Facebook, Tumblr, Instagram, news sites, and other websites will contain videos, animated gifs, and sound clips that may start playing as soon as you land on the site. So much content, so easily available almost everywhere on the internet.
Windows 8 Metered Connection Settings:
http://windows.microsoft.com/en-us/windows-8/metered-internet-connections-frequently-asked-questions If you’re a Window 8 user, please read this article and follow the instructions to change your connection settings. Windows 8 can use up A LOT of data.
Windows 10 Users:
http://www.groovypost.com/howto/manage-windows-10-data-usage/ Background applications on all devices: Even if you don’t have any active applications on your screen, your computer/device might have applications working in the background, and those may even be communicating online. Here are ways to check what is running in the background, based on your device.
Windows PC: http://www.ehow.com/how_5685413_check-programs-running-background.html
Mac OS X: http://www.ehow.com/how_4799610_running-processes-mac-os-x.html
iOS:http://www.macworld.com/article/1164616/how_ios_multitasking_really_works.html
Android: http://www.howtogeek.com/166140/you-dont-need-to-install-a-task-manager-how-to-manage-running-apps-o...
Kindle Fire: http://www.cyberockk.com/2013/07/5-ways-to-speed-up-your-kindle-fire-hd_3.html
Nook: http://bookclubs.barnesandnoble.com/t5/NOOK-Talk/Closing-apps/td-p/1234828
Microsoft BITS: http://en.wikipedia.org/wiki/Background_Intelligent_Transfer_Service
Potential Viruses and Malware: Malware can use your internet connection without your knowledge. Googost is just one example of how malware can do this. The other links are ways to secure your system to prevent malware from taking over.
Googost: http://www2.alcatel-lucent.com/techzine/battling-googost-bandwidth-stealing-bot/
General security information and tips: http://www.microsoft.com/security/pc-security/default.aspx
More security information for advanced users: https://www.us-cert.gov/Home-Network-Security
Avast! Anti-Virus Streaming Updates: If you use Avast!, please read this article, as it describes how it streams its anti-virus updates. Other anti-virus programs also need regular updates to safeguard your system. We recommend checking those update settings and adjust them, if possible, to download during your Bonus Bytes hours.
http://www.maximumpc.com/article/news/avast_introduces_streaming_updates_new_antivirus_software Cloud Backups: If you use any of these below, or any other cloud storage service, remember to check if these sync your data automatically. Syncing your data with the cloud uses your internet connection and therefore, uses your data allowance.
Dropbox
Google Drive
iCloud
MS Skydrive
Auto-Play videos/audio on websites (Facebook, Tumblr, Instagram, etc): Facebook, news sites, entertainment sites, etc. may have videos that auto-play as soon as you land on their page. Not all sites have a feature to turn auto-play off, so remember this. Even if you stop the media from playing fully, that entire video or song has already been cached, ready to be played.
Visit this link:
www.facebook.com/settings?tab=videos Change the option from ON to Off. (if you on the phone you would have to check the setting somewhere else)
Adjust your Netflix playback quality to SD:
https://help.netflix.com/en/node/87 Set-top boxes and Digital Media Receivers: These devices, and others like them, stream or store media, and use your internet connection. We’ve included links to these devices’ support pages.
Roku - http://support.roku.com/home
TiVo - http://support.tivo.com/app/answers/detail/a_id/1279
Chromecast - https://support.google.com/chromecast/?hl=en#topic=3447927
AppleTV - https://www.apple.com/support/appletv/
Amazon Fire TV - http://www.amazon.com/gp/help/customer/display.html?nodeId=201347660
DIRECTV Video On Demand
Dish Network Video On Demand
3rd Party E-mail: Using e-mail clients can constantly fetch and download your e-mail from their e-mail server. Most, if not all, e-mail clients let you adjust how often to check the server and download mail.
Outlook - http://office.microsoft.com/en-us/support/
Thunderbird - https://support.mozilla.org/en-US/products/thunderbird
Macmail - https://www.apple.com/support/mac-apps/mail/
Windows Live Mail - http://windows.microsoft.com/en-us/windows/email-communication-help#email-communication-help=windows...
Unprotected Wi-Fi Networks: Be sure to password protect your Wi-Fi network, or else you may have unauthorized devices connecting to your network, using your data. Here are links to some popular router support sites to help you get that set up. You should also have instructions on how to password-protect your network in your router’s user manual.
Netgear - http://support.netgear.com/for_home/default.aspx
Linksys - http://support.linksys.com/en-us/support?icid=global-header-support-link
D-link - http://support.dlink.com/
Belkin - http://www.belkin.com/us/support
ASUS - http://www.service.asus.com/#!consumer/csn9
Buffalo - http://www.buffalotech.com/support-and-downloads
(Apple) Airport Express - https://www.apple.com/support/airport/
The most important tool to download is the Status Meter, available in the Customer Support Center, so download that if you haven’t already: supportcenter.myhughesnet.com