Did I accidentally delete files? How can I recover them?

I’m a new PhD student and I’m dealing with a serious issue. I tried to map a directory from Server A (/home/lab/Desktop) to Server B (/home/usr/labDesktop) because Server B has better computing power. While working, all the data in the directory on Server A disappeared. Here’s a part of the sequence of commands I ran, which might have caused the problem: $ sudo sshfs lab@ipaddress:/home/lab/Desktop /home/usr/labDesktop [sudo] password for usr: The authenticity of host 'ipaddress (ipaddress)' can't be established. XXX key fingerprint is XXX. This key is not known by any other names Are you sure you want to continue connecting (yes/no/[fingerprint])? yes lab@ipaddress's password: $ ls labDesktop  examples.desktop $ cd labDesktop -sh: 44: cd: can't cd to labDesktop $ ls labDesktop  examples.desktop $ sudo sshfs lab@ipaddress:/home/lab/Desktop /home/usr/labDesktop lab@ipaddress's password: read: Interrupted system call $ fusermount -u /home/usr/labDesktop fusermount: entry for /home/usr/labDesktop not found in /etc/mtab $ ls labDesktop  examples.desktop $ cd labDesktop -sh: 49: cd: can't cd to labDesktop $ rm -r labDesktop rm: cannot remove 'labDesktop': Permission denied $ sudo rm -r labDesktop                           rm: cannot remove 'labDesktop': Device or resource busy $ mount | grep /home/usr/labDesktop lab@ipaddress:/home/lab/Desktop on /home/usr/labDesktop type fuse.sshfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0) $ fusermount -u /home/usr/labDesktop fusermount: entry for /home/usr/labDesktop not found in /etc/mtab $ fusermount -uz /home/usr/labDesktop fusermount: entry for /home/usr/labDesktop not found in /etc/mtab $ sudo umount /home/usr/labDesktop $ mount | grep /home/usr/labDesktop $ rm -r /home/usr/labDesktop $ ls examples.desktop As you can see, "sudo rm -r" threw an error message, "rm: cannot remove". So I don't believe this actually deleted the data. Moreover, I tried to unmount using "fusermount -u" before running "sudo rm -r". If "fusermount -u" failed with an error message, shouldn’t "sudo rm -r" have also failed with an error message? 1. Could this sequence of commands have caused the files on Server A to be deleted? Or is it likely something else caused the data loss? 2. How to recover them?