By default, data will be write to ./storage, is there a way to turn off this and use memory instead ?

Someone will reply to you shortly. In the meantime, this might help:

Like storing the data in an array variable?

What data you want to disable writing to disk? Scraping output or crawling stats/queues or what? I don't think you should disable it altogether (especially the crawlee stats/queues)

If the problem is that data, like queues, is persisted across runs, you can try using `apify run --purge`: https://docs.apify.com/cli/docs/reference#apify-run

ts
Configuration.set("persistStorage", false)

setting this before starting your crawler should do the trick. btwm you can also change the storage dir using something like

ts
const storageClient = new MemoryStorage({
  localDataDirectory: crawlStoragePath,
  persistStorage: true,
});

if you simply wanted to change the storage location

I'll just add another example:

typescript
import { MemoryStorage } from '@crawlee/memory-storage';
import { PlaywrightCrawler } from 'crawlee';
import { RequestQueue } from 'apify';

export const memoryRequestQueue = await RequestQueue.open(null, {
    storageClient: new MemoryStorage(),
});

const crawler = new PlaywrightCrawler({
    proxyConfiguration,
    requestQueue: memoryRequestQueue,
    // ...
});

etc.