Sorry for not being able to help.
Just suggesting to not use encrypting software on an backup disk if you're not planning to take it with you, but keep it safe in the house. That external disk is perfectly usable without it, as you saw when you wrote to it.
And, of course, it's not very smart to start encrypting a drive if it contains the only copy you know of of your data. But you knew that already.
Allow me to preface this by admitting fault in not properly organizing my data, nor providing full-coverage backup with multiple physical and cloud options.
After a few weeks of my laptop running slow with no detected viruses, I decided it best to reformat my drive and start fresh. This required backup, and opted to spend the cash on another external hard drive than to scour 200gb of data to remove duplicates and make space on drives already on hand. The following took place slowly afterward..
-Transferred data while I kept busy around the house
-Download WD software suite
-Began process of drive encryption
-Tried to renter (there was a reason I cannot remember, possibly over the natural process of WD's software config) and it tells me the password I just set moments beforehand is invalid.
-Whew, the drive is still unlocked so I begin transferring the data back to the computer to reformat drive and correct the mistake.
-Throw in a load of dishes, come check on progress.. and find Windows in the middle of forced updates. Oh. My. God.
91% made it over before the transfer was abruptly stopped, unless that 9% is allocated for encryption and whatever else WD software had parceled. That seems far too much space to hold true. What sucks is, without being able to know what didn't make it, I cannot check if I have it backed up elsewhere.
-I have the receipt. It shows a credit card (in my name) was used to purchase it. The drive was registered under me.
-I am aware that none of that matters.
-The password I (thought I) used 17 characters long, words are found in a dictionary, plus a character and number.
-Since I was obviously not paying attention, I may have substituted one of the words for another that would not be found in a dictionary.
What would be the most efficient tool to plug in both passwords to generate variations, and ideally attempt them for me? I have never needed to bypass a password before, so this is new territory. Downloading cracking tools from unrecognized sources also sounds like a great way to lose everything.
Sorry for the lengthy post, but wanted to provide context as this predicament is rather suspect.