How to say that I have done something in importance order in English?

Question

Is my sentence correct :

I put the files based on their importance in the attached folder.

The file structure should be something like that :

1- First file (Most important)

2- Second File ( Second most important)

3- Third File (Third most important)

Answer 1

"based on their importance", on its own, is ambiguous in that sentence. It could mean that you choose, based on their importance, whether to put the files in the folder or not.

So, your sentence needs to make it clear that it is the order in which the files are placed that is being determined by their importance.

Answer 2

Per Jeffrey's comment, you may use:

"I put (or insert) the files into the attached folder in order of importance."

Also, you may opt to use:

"... arranged according to importance..."

Kindly note that it is better to indicate that the first [or the topmost, etc.] item is the most important in case the context is not clear.

So to consolidate:

"I arranged the files according to importance in the attached folder, the first[topmost] file being the most important."

Answer 3

Adding to other great answers, you could consider using the verb to prioritize which means:

to list or rate (as projects or goals) in order of priority

Your example:

I have prioritized the files in the attached folder (as follows).

Or you could use to arrange in place of to put.

I have arranged the files in order of priority in the attached folder (as follows).

Priority is better than importance when you try to list in order of priority.