For hosting common files it's ok. Also it is on Android too do, great to transfer files between your Windows and your phone. But if you want better security you have to subscribe a monthly offer.
Dropbox - Online Sync and File Sharing
Disk Drill by Cleverfiles - Recover any type of deleted files in Windows & Mac including Office documents, messages, and media files quickly and easily.
Google Drive - Access and sync your files anywhere
TestDisk - TestDisk is a free and open source data recovery software tool designed to recover lost partition and unerase deleted files. DownloadDownload TestDisk & PhotoRec. TestDisk is a free and open .
Mega - Secure File Storage and collaboration
EaseUS Data Recovery Wizard - Advanced data recovery software to do format recovery, unformat and recover deleted files emptied...