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The ability to sync data (marks, routes, and tracks) between your devices is a relatively new feature within the app.
Syncing is a way to maintain the same set of data on multiple devices. ie. you might have a phone and a tablet, and you create waypoints on the tablet, and would like to see them on the phone.
Also, if you get a new device, it can be a quick way to get the data which is on the old device across to the new device.
To use Cloud Sync, you must create a Memory-Map account.
An account can be created on the Memory-Map website HERE.
Any time you wish to utilise any licensed resources purchased from Memory-Map, or use the syncing feature, you must sign in to your Memory-Map account to do so, as all purchased map licenses are attached to your Memory-Map account.
You will be prompted to sign in to your account via the Sign In page, where you can enter your username and password, and optionally select to save your password to avoid re-entering it.
Once you have entered your details, tap the Sign In button at upper-right to sign into your account.
To sync your data, from one of the data list pages Marks, Routes or Tracks, tap the Menu button, and select the Data Sync option.
This should sync all data in that list page with your account, if you are already signed into your Memory-Map account. If you are not signed in, you will be prompted to do so, as you cannot sync without being signed in.
By default, data items will be set to syncable when they are created, but you can turn sync off for individual items, or whole categeories using the menu items described in the pages in this eGuide related to Marks, Routes or Tracks.
If an item is marked non-syncable, it will not be sent to the cloud storage when you do the Cloud Sync command. In addition, it will never be modified by a Cloud Sync, in the event that it has been previously synced and has been modified on another device.
If you set an item to be non-syncable, you can delete it locally on the device, and it will not delete the object from the cloud. Also, if an item has been synced, and is then deleted on another device, it will not be deleted locally if it is set to non-syncable.
Therefore, setting a data object to be non-syncable isolates that data object from any changes in the cloud.
If you change an object from Non-syncable to be Syncable, and then do a Cloud Sync, then the cloud will updated to contain your version of the object.
Note that the account used for syncing is the same as the Memory-Map license management account. If you want to share overlay data (Marks, Routes and Tracks) with other people, the way to do that is using GPX files. If you give other people your account details, they may unintentionally use your license resources, and this would make it hard for you to manage your licenses. Do not use the sync feature as a way of sharing your overlay data with other people.
If your have synced data items which are subsequently changed on two different devices, only the most recently changed version is used. This can cause changes on the other device to be overwritten. If your data is valuable and they are being used other devices at the same time, save it as a GPX file before syncing.
While data items are transmitted using SSL encryption and securely stored, Memory-Map makes no guarantee about the security of the data. Do not rely on this feature to store valuable data: make a backup using saved GPX files. The data synced can include your location history (while the track logging feature is enabled). This data could be synced to family members if they are using the same license management account. If that's a problem, or if you have any other privacy concerns, don't use the sync feature!