The Snapshot destination folder is not writable

Hi guys,

I get an error when using Snapshot on my website. However, once I change the folder-permissions from 0755 to 0777 it seems to work, but I don't want to keep it that way.
Any idea on how to fix this issue?

ERROR: The Snapshot destination folder is not writable /www/htdocs/w0129c64/codekombuese/wp-content/uploads/snapshots/_backupERROR: The Snapshot restore folder is not writable /www/htdocs/w0129c64/codekombuese/wp-content/uploads/snapshots/_restoreERROR: The Snapshot destination folder is not writable /www/htdocs/w0129c64/codekombuese/wp-content/uploads/snapshots/_logsERROR: The Snapshot destination folder is not writable /www/htdocs/w0129c64/codekombuese/wp-content/uploads/snapshots/_logs/_sessionsERROR: The Snapshot locks folder is not writable /www/htdocs/w0129c64/codekombuese/wp-content/uploads/snapshots/_locks