In this stage of Lyme disease, the patient may experience arthritis weeks to years after the initial onset of the disease. The rheumatological symptoms begin as migratory musculoskeletal discomfort involving the joints, bursae, and tendons.
The trash folder is located at .local/share/Trash in your home directory. Additionally, on other disk partitions or on removable media it will be a directory .Trash-uid where uid is the uid of the user who moved the item to the trash.
In your case, you moved the file from it's original directory on the thumb drive, to the hidden .Trashes directory. When you Empty Trash, the computer will locate the hidden directory on all the attached drives / devices and remove the files from them.