nǐ bǎ shū hé zīliào zhěnglǐ zhěngqí yǐhòu, zhǎo dōngxi huì fāngbiàn hěnduō.

把 is a grammar marker that brings the object forward and highlights what happens to it.

In this sentence:

你把书和资料整理整齐以后

the object 书和资料 comes before the verb 整理 because the speaker wants to focus on what you do to those books and materials.

A very literal way to feel the structure is:

• 你把书和资料整理整齐
  = You take the books and materials and put them into an organized/neat state

English usually does not work this way, so it can feel unusual at first.

A simple comparison:

• 你整理书和资料以后... = After you organize the books and materials...
• 你把书和资料整理整齐以后... = After you get the books and materials organized neatly...

The 把 version often sounds a little more result-focused.

That is because of the 把-construction.

In a normal sentence, the object often comes after the verb:

• 你整理书和资料。

In a 把-sentence, the object moves in front of the verb:

• 你把书和资料整理整齐。

This pattern is especially common when:

• the action clearly affects the object
• the sentence includes a result or outcome
• the speaker wants to emphasize what happens to that object

Here, the result is 整齐: the books and materials end up neat and organized.

They are related, but they are not the same kind of word.

• 整理 = to organize / to sort out / to put in order
  This is the action.
• 整齐 = neat / tidy / in good order
  This describes the result or state.

So:

• 整理 = the process
• 整齐 = the final condition

In this sentence, 整理整齐 means something like:

• organize them neatly
• put them in good order

It is showing both the action and the result.

Yes, this kind of pattern is common in Mandarin.

Chinese often uses:

• verb + result/state

Here:

• 整理 = organize
• 整齐 = neat

So 整理整齐 means organize until they are neat.

This is similar in idea to other result expressions, such as:

• 写完 = write and finish
• 打破 = hit and make broken
• 弄干净 = make clean

So even though 整理 and 整齐 look similar in meaning, they play different roles:

• one is the action
• one is the outcome

Yes. Those are both possible, but the nuance changes a little.

• 整理好 = organize properly / get it done
  Focuses more on completion
• 整理得很整齐 = organize it very neatly
  Focuses more on how neat the result is
• 整理整齐 = organize it into a neat state
  A compact result-focused expression

So these are all natural, but not identical.

For example:

• 你把书和资料整理好以后...
  After you’ve finished organizing the books and materials...
• 你把书和资料整理得很整齐以后...
  After you’ve organized the books and materials very neatly...
• 你把书和资料整理整齐以后...
  After you’ve organized the books and materials neatly / into a neat state...

Here 以后 means after.

It comes after the earlier action:

• 把书和资料整理整齐以后
  = after organizing the books and materials neatly

So the structure is:

• [event/action] + 以后 = after [event/action]

It can also mean later in other contexts, such as:

• 以后再说。 = We’ll talk about it later.

So the meaning depends on what comes before it.

In this sentence, because 以后 follows a full action phrase, it clearly means after.

Here 会 means something like will or is likely to.

• 找东西会方便很多。 = Finding things will be much more convenient.

It is not mainly about ability here. It is describing the expected result once the books and materials are organized.

So the idea is:

• if you organize them neatly,
• then finding things will become much easier/more convenient

In many sentences, 会 can mean:

• will
• would
• be likely to
• sometimes know how to

But in this sentence, will be is the best match.

Both are natural, but they focus on the idea differently.

• 找东西会方便很多
  = Finding things will be much more convenient.
• 你会更容易找到东西
  = You will find things more easily.

The original sentence talks about the process/situation being more convenient, rather than directly saying you will find things more easily.

This is very natural in Chinese. Chinese often uses 方便 to describe whether doing something is convenient.

Examples:

• 这样很方便。 = This is very convenient.
• 坐地铁比较方便。 = Taking the subway is more convenient.
• 找东西会方便很多。 = Finding things will be much more convenient.

Yes. Here 东西 means things / items / stuff in a general sense.

So:

• 找东西 = look for things / find things

In this sentence, it does not mean one specific object. It means items in general—whatever you need later.

A small note: 找 can mean both:

• look for
• find in some learning translations, depending on context

But in 找东西会方便很多, the natural idea is:

• it will be much easier/more convenient to find what you need

很多 here means a lot / much, and it modifies the degree of 方便.

So:

• 方便很多 = much more convenient

This is a very common Chinese pattern:

• Adj + 很多
• often understood as much more + adjective when there is a comparison in context

Examples:

• 好很多 = much better
• 快很多 = much faster
• 便宜很多 = much cheaper

In your sentence, the comparison is implicit:

• before organizing: less convenient
• after organizing: more convenient

So 方便很多 means a lot more convenient than before.

The subject is understood from context, so Chinese does not need to repeat it.

The sentence is:

• 你把书和资料整理整齐以后，找东西会方便很多。

After the comma, Chinese does not repeat 你, because it is already clear. The idea is:

• After you organize the books and materials neatly, [you / one] will find it much more convenient to find things.

Chinese often omits subjects when they are obvious.

If you wanted to make it more explicit, you could say:

• 你把书和资料整理整齐以后，你找东西会方便很多。

But that usually sounds less natural because the second 你 is unnecessary.

Because the sentence is talking about books and materials in a general sense, not counting them.

Chinese measure words are usually needed when you specify number or demonstratives, for example:

• 一本书 = one book
• 这些资料 = these materials/documents

But when speaking generally, bare nouns are often fine:

• 书和资料 = books and materials

That is very normal Chinese.

Yes, you can, although the emphasis changes.

For example:

• 你整理好书和资料以后，找东西会方便很多。
• 你把书和资料整理整齐以后，找东西会方便很多。

Both are natural.

The version with 把:

• sounds more focused on what happens to the books and materials
• highlights the result state more strongly

The version without 把:

• is simpler
• may feel a little more straightforward to learners

So 把 is not the only possible structure, but it is very appropriate here.