The first thing to do is do not use the drive. The deleted file will probably still be on the disc, but the space it occupies is now marked as available for use so if the drive is used there is a chance that new files/data may be saved to the disc which could overwrite some or all of your file.
There are many software options available for file undeletion/recovery, some free, some trialware and some paid. But a little more information is needed here - what OS are you using on the machine where you’re trying to recover the file, and indeed what OS were you using on the machine where you deleted it in the first place? Your example sounds like one of the paid ones, but there are others out there which are similar and may be free or at least cheaper.
If you deleted it from a Windows machine, there is a chance that it could be available in the Windows recycle bin. If it was, there may be a folder on the WD drive that is the recycle bin for that drive, and so it may be visible to the machine within the recycle bin on the desktop and if so it can simply be restored in the normal way (the drive will need to be plugged into the machine for the recycle bin area on the drive to be visible to the machine). There may be a similar mechanism for Linux or Mac, but I don’t know those OS’s in enough detail to comment.