project folder, subfolders and contained files -- saving disk space

Question

I am rather new to SDL, having only recently purchased the SDL Trados Studio 2019 freelance version. 
 Can anyone tell me something about the subfolders and files contained in the project folder Studio creates, when I create a new project? 
 Let's say I receive a job via email to translate two MS WORD files of 10 MB each. I save these files into a project folder. 
 When I create a project in Studio, Studio creates subfolders for the language pair in the project folder I specify for this project (where I saved the two files); let's say in this case de-DE and en-US for a translation from German to English. 
 Inside the the subfolders Studio also creates sdlxliff files and in the de-DE subfolder it creates copies of the files I am going to translate. So if I had two files to translate, each around 10 MB, I would now have two new copies of these files in a subfolder, amounting in total to 40 MB, without even taking the sdlxliffs or other project files into account. 
 When I finish the job and save the translations as WORD files in the en-US subfolder, the entire project folder now takes up 60 MB (plus TMs, sdlxliff files and termbases). 
 
 My question concerns whether I can save space on my hard disk. 
 Can I delete any of these files in the project folder/subfolders after I have finished, for the sake of reducing the amount of space used on my disk? If I want to back up these files, it would be nice if I could first delete any files which aren't absolutely necessary. 
 Can I delete the original files in the main folder, which I copied there from the email of the customer? Can I delete any of the other files in the subfolders, without causing problems in future, should I have to reopen the project for additions or changes? 
 Can anybody point me to any info material where I can read about this? Thanks in advance!

Paul · Answer

Hello SimonB 
 Unknown said: Can I delete any of these files in the project folder/subfolders after I have finished, for the sake of reducing the amount of space used on my disk? If I want to back up these files, it would be nice if I could first delete any files which aren't absolutely necessary. 
 If you don't want to retain the whole project you don't need to. I think the most important files you have are probably these: 
 
 Your Translation Memory that will contain the translations for this work anyway 
 Your termbases (glossaries) 
 The SDLXLIFF files in the target language folder as a belt and braces (these contain the bilingual content for the translation and you could recreate the target translation (unless they were created with filetypes you don't have) and your Translation Memories from these files) 
 
 So once your projects are complete you could do this: 
 
 remove the projects from Studio 
 backup the SDLXLIFF files to somewhere safe 
 delete the project files from windows 
 
 Your TM and TB (Glossary) are probably safely saved somewhere else anyway so that would be it. The important thing to note is that you remove them from Studio BEFORE you delete them in windows. It won't be the end of the world if you do, but it's just cleaner this way.

Trados Studio > 1. Trados Studio

project folder, subfolders and contained files -- saving disk space