Your FTP/SFTP client

AndSMB - Samba/CIFS/Windows share client

File explorer and manager, ZIP support (optionally encrypted)

AndFTP unlock key

Amazon S3 cloud storage service from anywhere

Google Cloud Storage client

SMB client unlock key

Google Cloud Storage client

File manager, search, zip/unzip, no permission other than storage/write

Amazon S3 cloud storage service from anywhere (professional)