Wording

Signed-off-by: Cédric Foellmi <cedric@onekiloparsec.dev>

Author: onekiloparsec

docs/astronomers/data/external-storages.md

@@ -1,43 +1,32 @@
-Data & Observations Overview
-===
+# Arcsecond Cloud Storage vs External Storages
 
-Arcsecond aims at providing a consistent platform for astronomical observers, being single or grouped into an
-organisation (such as an astronomy club, or an observatory - see [Observatory Portals](/portals/) made for that).
-
-As such, Arcsecond offers solutions for astronomical data alone, for observations alone, and for the combination of
-the two (where things become clearly more interesting).
-
-Arcsecond Cloud Storage vs External Storages
----
-
-The principle is the following. With each personal account, and identically, with each Observatory Portal, comes the
-[Arcsecond Cloud storage](./cloud-storage.md) by default. It is an unlimited read-write storage (you can upload, modify,
-delete your files) based on secured Amazon AWS S3 buckets.
-
-In addition to that, multiple External Storages can be attached to the above account or portal. There is no restrictions
-on the number of storages one can attach to an account or portal. These are read-only storages and Arcsecond will not
-modify anything in them. Credentials will have to be provided, and will be stored encrypted and securely sealed in
-Arcsecond ([read more](./credentials-security.md)).
+External Storages are existing data storages owned by an astronomer, or an Observatory Portal. Arcsecond allows to
+attach them to the account or portal. There is no restrictions on the number of storages one can attach to an account or
+portal. These are read-only storages and Arcsecond will not modify anything in them. Credentials will have to be
+provided, and will be stored encrypted and securely sealed in Arcsecond ([read more](./credentials-security.md)).
 
 Find tutorials on how to provide credentials for your external storages in:
 
 * [Amazon AWS S3 buckets](./external-storage-aws.md)
 * [Dropbox](./external-storage-dropbox.md)
-* FTP (coming soon)
-* Local disk (coming with self-hosted Arcsecond, later in 2023)
+* [Azure](./external-storage-dropbox.md) (`in preparation`)
+* FTP
+* SFTP
+* Local disk (coming with self-hosted Arcsecond, `in preparation`)
+* Archives (ESO, CADC, HST, etc – `in preparation`)
 
 For each account or portal, based on the accessible storages, Arcsecond will be able to extract and organise information
 about your nights and observed targets.
 
 ![Overview of Observations & Data](/images/observations-data-overview.png){data-zoomable}
 
-Arcsecond will parse content of external storages, identically to what it does on its
+Arcsecond will scan and parse content of external storages, identically to what it does on its
 own [Cloud Storage](/observations/cloud-storage) when data is uploaded to it. This parsing allows to:
 
 * Extract FITS- and XISF-files headers, for easy searching in a web interface,
 * Create 2D-image and 1D-spectrum previews (stored in Arcsecond Cloud storage, within the 50GB limit, unless you unlock
   more),
-* **Create your personal list of all your observed targets, associated with its data** (this will combine all cloud and
+* **Create your personal list of all your follow-up targets, associated with its data** (this will combine all cloud and
   external storages you have attached),
 * Reconstruct your observing nights (when possible).