The following list is an excerpt from an e-mail reply by ESOTU SUPPORT (2015 -11-10 Patch 2.2.4) Text in italics is added by the OP.
"You can buy inventory space by purchasing pack upgrades from pack merchants. Upgrading your bags increases their size by 10, from 60 slots to 110 (now 140) slots. Pack merchants are in almost every major city in Tamriel. The price to upgrade your inventory space is:
60 to 70 bag slots cost 400 gold
70 to 80 bag slots cost 2,000 gold
80 to 90 bag slots cost 5,900 gold
90 to 100 bag slots cost 11,900 gold
100 to 110 bag slots cost 19,200 gold
110 to 120 bag slots cost 30,700 gold
120 to 130 bag slots cost 46,000 gold
130 to 140 bag slots cost 64,500 gold
You can buy bank slots by purchasing upgrades from the banker. Upgrading your bags (bank slots) increases their size by 10, from 60 slots to 130 (now 240) slots. The price to upgrade your bank space is:
60 to 70 bank slots cost 1,000 gold
70 to 80 bank slots cost 3,300 gold
80 to 90 bank slots cost 6,800 gold
90 to 100 bank slots cost 11,400 gold
100 to 110 bank slots cost 20,500 gold
110 to 120 bank slots cost 28,300 gold
120 to 130 bank slots cost 32,700 gold
130 to 140 bank slots cost 37,500 gold
140 to 150 bank slots cost 42,700 gold
150 to 160 bank slots cost 45,000 gold
160 to 170 bank slots cost 50,000 gold
170 to 180 bank slots cost 55,000 gold
180 to 190 bank slots cost 60,000 gold
190 to 200 bank slots cost 65,000 gold
200 to 210 bank slots cost 70,000 gold
210 to 220 bank slots cost 75,000 gold
220 to 230 bank slots cost 80,000 gold
230 to 240 bank slots cost 85,000 gold
"
NOTES:
(1) Future price changes, if any, should be disclosed in the Patch Notes for the TESO version in which the change(s) are made. Perchance an in-game price demanded by a bag merchant or a banker is different from the numbers above, you can report it as a bug (use the key that is bound to screenshots to make one that shows the price, then enter /bug in the chat command line). However, if the numbers differ, it is doubtful that the developers will change the in-game data soon, if at all.
(2) For each character that you create, you can buy one Bag Space about once per day as a "Riding Lesson" from a Stablemaster -- up to a maximum of 60 slots. Currently the cost is 250 Gold Pieces per lesson (15,000 GP total). Be aware that the benefits of Riding Lessons are bound to the player's character, not to any mount. If the avatar summons a different mount, the benefits of the Riding Lessons go with the avatar to that mount. So, Bag Space cannot be increased by purchasing an additional mount(s).
Update: adding Bag Space with Riding Lessons for a character has no effect upon the increasing cost charged by Bag Merchants for additional Bag Space.
(3) We also can add 10 Bag slots or 10 Bank slots either by purchasing the corresponding "pack" at the Crown Store for 1,000 Crowns, or by using Crowns credited to our store account if we have an ESO Plus subscription. Note that using Crowns to add 10 Bag and/or Bank slots does increase the GP cost of further upgrades in-game, in accord with the price lists above.
The ESOTU Support reply continues: "... We are genuinely interested in your opinion and what you think about The Elder Scrolls Online. The fastest way to let our developers know, is to submit feedback by using the /feedback command in the in-game Chat Box."
Please use that feature to express your opinions and/or to offer suggestions about ESOTU storage space issues, not by replying to this post.
So now you know (as Paul Harvey always concluded his newscasts). ;-)
Edited by Shadowshire on August 5, 2021 3:42PM --- Shadowshire .......... ESO Plus on PC NA with Windows 7 Pro SP1
nil carborundum illegitimi