Nextcloud
Close matchFree with paid extrasFolders appear in your file manager again, with sharing links and the option of an end to end encrypted folder.
Your files: No direct transfer. Download from Sync.com once and upload to the new service.
Does Sync.com run on Linux?
Verdict: Partly
Partly. Sync.com offers desktop apps for Windows and Mac only, with no Linux version, but the website works in a Linux browser so your files stay reachable.
The Sync.com install page lists a Windows app and a Mac app and nothing else. There is no Linux download, so the synced folder in your file manager does not survive the move.
You keep access through the website. Sign in in Firefox or Chrome and you can browse, upload, download and share links the way you did before. For occasional use that is enough. For daily work it is a real step down, because every edit becomes download, change, upload again rather than just saving a file.
Be careful with the encryption. Sync.com encrypts your files so that it cannot read them, which is the main reason people choose it, and that also means nobody can recover your account if you lose the password. Make sure your password and any recovery details are written down somewhere safe before you wipe the Windows machine, because the browser is now your only way in.
Your files themselves are ordinary files and download unchanged. If having a real folder on your desktop matters more than staying with Sync.com, one of the alternatives below gives that back.
What to use instead of Sync.com
Dropbox
Close matchFree with paid extrasHas a maintained Linux app if a working synced folder is what you actually need. Less private than Sync.com by design.
Your files: No direct transfer. Files move by downloading and re uploading.
Syncthing
Different way of workingFreeMatches folders directly between your own devices, encrypted in transit, with no company holding a copy. No web access and no backup if the house burns down.
Your files: Works on plain folders of files.
Last checked . Sources: