FolderSync是一款支持各大国外网盘同步的软件，目前支持
SkyDrive, Dropbox, SugarSync, Ubuntu One, Box.net,
LiveDrive, HiDrive, NetDocuments, Amazon S3,
FTP, FTPS, SFTP, WebDAV和windows share (Samba/CIFS)。
具体步骤就是：
在服务器上架设 FTP 服务，或 WebDAV 服务等等， 然后在
FolderSync 里添加帐户（FTP/SMB/WebDAV 等等服务器），
再设定好同步规则，如充电时、仅 WIFI、2G/3G 等等，
之后手机相册一但有变动，都会同步到家里服务器上。
Supported cloud providers:
☆ Amazon S3 Simple Storage Service
☆ Bitcasa
☆ Box
☆ CloudMe (using WebDAV)
☆ Copy.com
☆ Cubby (using WebDAV)
☆ Digitalbucket.net (using WebDAV)
☆ Dropbox
☆ Dump Truck (using WebDAV)
☆ GoDaddy (using WebDAV)
☆ Google Docs
☆ Google Drive
☆ HiDrive (using WebDAV)
☆ Livedrive (using WebDAV)
☆ MyDrive.ch (using WebDAV)
☆ NetDocuments (using WebDAV)
☆ Skydrive
☆ SugarSync
☆ Ubuntu One
☆ WEB.DE (using WebDAV)
☆ Yandex Disk (using WebDAV)
Supported protocols:
☆ FTP
☆ FTPS (SSL/TLS implicit)
☆ FTPES (SSL/TLS explicit)
☆ SFTP (SSH File Transfer)
☆ Samba/CIFS/Windows Share
☆ WebDAV (HTTP/HTTPS)
Current features:
☆ Multiple accounts (full version)
☆ File manager - manage your cloud files
☆ Amazon S3 Client Side Encryption support
☆ Tasker/locale support (full version)
☆ User defined sync filters (full version)
☆ Sync to and from you selected provider
☆ Two-way sync with support for deletions
☆ Backup/restore settings
☆ User specified sync interval or specific sync times
☆ Choose connection types for each sync item
☆ Support for syncing of subfolders
☆ Sync of hidden files can be disabled
☆ No ads (full version)
Deletion in two-way sync:
To enable deletions in two-way sync, the option “Do not sync deletions” must be unchecked
FTPS/FTPES servers without resume support:
Use these at your own risk, as uploads may become corrupt.