There is a great difference between Advanced and Standard folders in terms of their architecture.
Advanced folders were first introduced in Sync 2.0, whereas Standard folders are essentially the same folders that existed in Sync 1.4. To connect to other devices and sync data between them, Sync 1.4 used randomly generated keys, while Sync 2.x is based on public key infrastructure (PKI), which enables users to verify each other's identity with the help of digital certificates. This innovation has ensured three major things:
Additional security. All connection operations (adding peers, sharing folders, etc) are carried out with the help of X.509 digital certificate.
New functionality and convenience. Such features as My Devices and On-the-fly Permission Changes have become possible due to the new architecture. Besides, since Sync 2.2 stores certificates of previously dealt-with users, it can tell 'new' and 'old' peers apart. If you have successfully exchanged data with some peer, you may disable approval requirement for that peer while keeping it enabled for new peers.
Despite implementing drastic architecture changes in the new Sync, Resilio has made it possible to continue using 1.4 (Standard) folders. Please note though that these folders lack some of the new functionality offered by Advanced folders:
- The concept of folder Owneris not applicable to Standard folders: it doesn't matter whether you have a Read Only or Read & Write key - in either case you can continue sharing the folder with others.
- On-the-fly permission changes are not possible.***
- No user identity will be reflected in your peer list - only peer details and device names. Besides, if you share a folder with a user who has several devices linked under one certificate, on a Standard folder peer list each device will be displayed as a separate entity.
For example, we have an Advanced and a Standard folder added to Sync 2.2:
Both of these folders are shared with another person, who has two devices - a desktop computer and a mobile phone - linked via My Devices. If we click on the peer list (peers online) of the Advanced folder, we'll see this:
Note that even though there are two peers in the main window, Sync is able to 'see' that they both belong to the same user - Alex. However, if we click on the peer list of the Standard folder, the following information will be displayed:
With a Standard folder, Sync doesn't 'see' that the two peers are actually associated with one user - Alex - and displays them separately. No other limitations apply, that is, both folder types enjoy high transfer speed, no folder-size limits, Selective Sync etc.
***It is possible to change access key (permission) for a Standard folder when it is already shared,however, this procedure is not as smooth and easy as it is with Advanced folders. Besides, only one-way change is possible: from Read & Write to Read Only.
1. Go to folder options and copy RO or R&W key:
Alternatively, you can click "Preferences" and copy keys from there (The Standard folder Preferences window will also display keys):
2. Copy a new key and send it to another peer. On his/her computer that person should go to the Folder Preferences and hit >'Update key'(appears in Folder Preferences of those peers who act as key recipients).