Decompressed hard drive files like nextcloud

the Seafile files on my Hard disk are compressed and can’t be open if the system is not working further. Is there a possibility to use files inside seafile without the compression like on ne Nextcloud?

Seafile always stores files in blocks. Your only option would be to use Seadrive or webdav to access your files. If your server is no longer working there are tools to extract the files. AFAIK this is limited to unencrypted libraries only.

You can mount the seafile files to a folder with seaf-fuse. This is a read-only access, which means you can’t modify files. Only unencrypted libraries are supported by seaf-fuse.