Updated README (#4180)

README.md

@@ -42,8 +42,15 @@ changes but we don't guarantee anything. Things can and will break.**
 System Requirements
 ===================
 
-For an Archive node of Mainnet we recommend >=3TB storage space: 1.8TB state (as of March 2022),
-200GB temp files (can symlink or mount folder `<datadir>/etl-tmp` to another disk). Mainnet Full node (see `--prune*` flags): 400Gb (April 2022), BSC Archive: 7Tb. BSC Full: 1Tb. Goerli Full node (see `--prune*` flags): 189GB on Beta, 114GB on Alpha (April 2022).
+* For an Archive node of Ethereum Mainnet we recommend >=3TB storage space: 1.8TB state (as of March 2022),
+200GB temp files (can symlink or mount folder `<datadir>/etl-tmp` to another disk). Ethereum Mainnet Full node (see `--prune*` flags): 400Gb (April 2022).
+
+* Goerli Full node (see `--prune*` flags): 189GB on Beta, 114GB on Alpha (April 2022).
+
+* BSC Archive: 7TB. BSC Full: 1TB. 
+
+* Polygon Mainnet Archive: 5TB. Polygon Mumbai Archive: 1TB.
+
 SSD or NVMe. Do not recommend HDD - on HDD Erigon will always stay N blocks behind chain tip, but not fall behind. 
 Bear in mind that SSD performance deteriorates when close to capacity.
 
@@ -67,6 +74,8 @@ Default `--syncmode=snap` for `mainnet`, `goerli`, `bsc`. Other networks now hav
 
 Use `--datadir` to choose where to store data.
 
+Use `--chain=bor-mainnet` for Polygon Mainnet and `--chain=mumbai` for Polygon Mumbai.
+
 ### Optional stages
 
 There is an optional stage that can be enabled through flags:
@@ -91,6 +100,8 @@ the chain in `--chain`.
 
 ### Mining
 
+**Disclaimer: Not supported/tested for Polygon Network (In Progress)**
+
 Support only remote-miners.
 
 * To enable, add `--mine --miner.etherbase=...` or `--mine --miner.miner.sigkey=...` flags.