Any current accounts over this limit could keep the increased storage for at least 12 months. Following calls for Microsoft to reverse the reduction decision, Microsoft announced on December 11 of the same year that it would allow existing users to request to have up to 30 GB of free storage unaffected by the reduction, and said it would fully refund customers of Office 365 not satisfied with the 1 TB cap, among other redress. In June 2019, alongside the announcement for the Personal Vault, Microsoft announced that it would increase the OneDrive standalone storage plan from 50 GB to 100 GB at no additional charge, and that it would be giving Office 365 subscribers a new option to add more storage as they need it. Versioning OneDrive initially did not store previous versions of files, except for Microsoft Office formats. In July 2017, however, Microsoft OneDrive team announced that version history support for all file types was the top requested feature; as such, OneDrive would keep older versions of all files for up to 30 days. Recycle bin OneDrive implements a "recycle bin"; files the user chooses to delete are stored there for a time, without counting as part of the user's allocation, and can be reinstated until they are ultimately purged from OneDrive. Download as ZIP files Entire folders can be downloaded as a single ZIP file with OneDrive. For a single download, there is a limit of 15 GB; the total ZIP file size limit is 20 GB; and up to 10,000 files can be included in a ZIP file. Files On-Demand On Windows 10, OneDrive can utilize Files On-Demand, where files synchronized with OneDrive show up in file listings, but do not require any disk space. As soon as the content of the file is required, the file is downloaded in the background. Editing Office for the web Microsoft added Office for the web (known at the time as Office Web Apps, later renamed to Office Online and again to just Office) capability to OneDrive in its "Wave 4" update, allowing users to upload, create, edit and share Word, Excel, PowerPoint and OneNote documents directly within a web browser. In addition, Office for the web allows multiple users to simultaneously co-author Excel documents in a web browser, and co-author OneNote documents with another web user or the desktop application. Users can also view the version history