Timsonrobl

From your answers I assume that either my case of using BitTorrent Sync was not typical and therefore not supported by developers or that having double the volume of folder of any size as temporary files for 24 hours is considered normal or not-critical. This is strange to hear but I accept you answer and do not expect this to be fixed any time soon. The best way in my opinion is to let users decide what they need and add such option.

I fail to understand why doubling of storage space requirement is unavoidable. Program may move outdated copy of a file to temporary location then download new one and then remove old copy.This means space occupied by files only temporary doubled during sync process for particular files being synced. This would seem reasonable for me. Or with some important data taking little space (like documents) it may be safer to have copies of several older versions of files. Why user can't choose what he needs? Having a full duplicate of all modified files for 24 hours may be disastrous for big Sync folders especially on mobile devices. And if they can be safely removed after 24 hours why not after 5 minutes or 10 seconds? I don't understand what's the difference.

I encountered a VERY serious problem today related to this issue. I sync a folder with 8GB of music between my PC and 2 android devices. Yesterday I used tagging tool to repair charset of tags in all my music collection on PC and assumed it would be synced to all my devices automatically. Today my phone started going crazy about not having enough space when it was very critical to me to use my camera. Later I investigated and found out that Sync created .sync/archive folder with 8GB of old versions of all my music files, totally useless and unnecessary. This filled up all my free space on SD card and prevented me from using camera in a critical safety concerning situation. At first I assumed it was my mistake, that I didn't uncheck this archiving option for this folder. But as I found out developers decided that they know better and users should not permitted to tune settings for their Sync folders as they see fit. Unfortunately I have to uninstall and stop using this application until this issue is resolved, which I am doubtful about because this issue is known for nearly a year and is still unresolved.