Windows 10: Access to locally stored data from OneDrive

gw348 · May 25, 2024

Hi I understand the benefits of WHfB, I also understand that if someone gets a users pin they have no way of accessing data stored on any other device. If they wanted to access my Office 365 stored docs they would still need my O365 credentials. However my question is, in the instance that someone does steal your device and knows your pin, what mechanisms could we have in place from that user then accessing your locally cached OneDrive data. Or even the opening up Outlook and accessing their stolen users emails etcThanks for anyone's input

:)

mke48 · May 25, 2024

Possible to access data no longer stored in AppData/Local/Temp?

A few months ago I downloaded data somewhere and it was stored in C:/Users//AppData/Local/Temp. However it is no longer there as only files up to a few months ago are listed there. Is there any way at all I can access data stored there prior to a few months ago?

Brink · May 25, 2024

Getting started storing app data locally

When thinking about your app data, one aspect to consider is data lifetime. In general, when it comes to the lifetime of data, you have two options: local data, which exists as long as the app that created it remains installed, and roaming data, that will continue existing online even after your app is uninstalled. If you want your data to be roamed/synced and live independently of a single app installation you have different options available, such as the roaming app data feature discussed in the recent blog post series on that topic or by using a cloud data provider, such as OneDrive or Azure.

In today’s blog post, we will talk about local data, or data that is tied to the specific device where it was created. We will be looking at the different features that the Universal Windows Platform provides you with to do this, examples, and best practices.

Types of app data

There are two types of app data: settings and files.

Settings. Use settings to store app state and user preferences. The Universal Windows Platform (UWP) provides APIs to easily store and retrieve settings. The data types you can use in app settings are:

UInt8, Int16, UInt16, Int32, UInt32, Int64, UInt64, Single, Double

Boolean

Char16, String

DateTime, TimeSpan

GUID, Point, Size, Rect

ApplicationDataCompositeValue—a set of related app settings that must be serialized and deserialized atomically

Files. Use files to store binary data or to serialize your own custom types.

Storing app data locally

When an app is installed, the system creates a per-user app data container on the device. This app data container is within the app sandbox, which means no other app will be able to access it. The system will preserve the content of the data container when the app is updated and will remove it when the user uninstalls the app.

As a developer, you have three locations available in the app data container to store data locally:

Local

LocalCache

Temporary

Local

Local can contain both files (LocalFolder) and settings (LocalSettings) and should be used for any information that is of user value and can’t easily be recreated or downloaded. Data stored in Local can be backed up by the system if the device supports App Data Backup. Because of this, you should avoid using Local to store cached or temporary files that you could create or fetch again on demand.

App Data Backup

During a device backup operation, the system will grab any app data in Local and store it as part of a device backup image in OneDrive. If the user resets or replaces the device, he or she will be given the choice to restore a previous backup, which will restore the app data in Local as part of the app’s installation. Note that by not storing data in Local you will effectively be opting out of backup for your app.
Best practices for Local

Use for data with user value that can’t be recreated or downloaded by your app. If you place cached content or throwaway data in Local you are wasting user storage on OneDrive and delaying how long it takes to install your app during a device restore.

Use for settings that are unique to a device. In general, it is desirable to have common user settings on all of the user’s devices. However if you have settings that you don’t want roamed you should store them in Local.

Do not store credentials in Local. In order to offer the best user experience around credentials you should be using the Credential Locker feature.

Avoid it for data tied to specific hardware. If you have data that can only be consumed on the same physical device where it was created do not place in Local, because the user may choose to restore this data to a different device. One example of data tied to specific hardware is anything derived from device ID.

Using LocalFolder

To read or write files in LocalFolder, you must use the ApplicationData.LocalFolder property; you will get back a StorageFolder. You can then use StorageFolder.CreateFileAsync and StorageFolder.GetFileAsync to write and read files.
Click to expand...

Read more: Getting started storing app data locally | Building Apps for Windows

darkM · May 25, 2024

Access files cached locally in OneDrive for Business

Hi Community!

I have left my old company and I would like to know if there is a way to access the files I had stored in OneDrive for Business? I can see/explore the files in OneDrive synced and stored on my personal machine but cannot open them due to permission restraints. Are there any tools/suggestions to remove those permissions and open the files without having to contact my old IT?

Windows 10 Pro 1903 64bit

Thanks!

Windows 10: Access to locally stored data from OneDrive

Access to locally stored data from OneDrive

Access to locally stored data from OneDrive

Access to locally stored data from OneDrive

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Possible to access data no longer stored in AppData/Local/Temp?